AIBU for not wanting to pay rent?

OP doesn't have to do these things.
She can accept it as it is, or find somewhere else.

I would pay your sister 75 while you are house sitting for BIL parents - but if you are anywhere else - say - on a holiday, you should be paying 100 to your sister.

Do not complain but do be more definite in not accepting any more dog sitting jobs and also keep your personal house hunting and income earning details to yourself. You don't need to share so much private information.

Your sister can always ask another lodger to move in after you have left so don't feel bad when you move to your own place.

Use the time you're spending living and looking after the dogs to move your stuff to the parent's house (at least in the immediate term). Then take one of the offers you've seen and move your stuff from the parent's house to that place.

Never return to DSis & Bil's place.

I'm just wondering if there was a reason why you needed to emigrate or was it to 'help' Sister and BiL out? If you could find a job in your native country, would you? Could you afford to live there and have an enjoyable life there?

It seems as though Sister has you under her thumb and as for looking for more money - they are jealous that you're earning more than the two of them combined. Tell them how to earn more money (study, do well at school/college and then get a better job) rather than pay them more money. Definitely stop subsidising their social lives.

Edited to add - Under NO circumstances are you to book BiL's family pet into a vet for an injection or for any medical treatment. The dog is not yours. Get BiL to do it and he pays.

Treat this "housesitting" as a breather to allow you to arrange somewhere else to live. It's neither your fault nor your responsibility to bolster their income for them by paying over the odds for a room AND providing childcare when they want or need it.

Good luck.

It’s not £100 though is it ? It’s everything else on top, plus babysitting, plus dog walking. That’s saving her sister a bundle on its own. Now they want her to dog/house sit unpaid and pay vet bills out of her own pocket until they get back. You couldn’t make this shit up.

They are using you. It’s appalling. I think you need to find a house share asap. Let the BIL sort out his parents dogs.

Get the money upfront for the dog (and what they already owe you) or you don’t take the dog to the vet again. Suck up the £100 for now but arrange to move out immediately the current house sitting ends.
Basically finish your current commitments, that you agreed to (even though you shouldn’t have) but have new accommodation ready to move into asap.

Stop the babysitting and any other favours. They are clearly taking the piss. They managed before you moved there so they can manage again.

If you can maintain a decent relationship based on mutual respect and on an equal footing (perhaps if you are invited for a meal a week etc with no expectations , then you can reintroduce the odd evening babysitting as a favour. Don’t put yourself out too much though. If it’s easier to have the kids at yours, get them to drop them round. You should be inconvenienced as little as possible.
If you can’t get to a fair, equal relationship, I’d cut them out if my life. Their jealousy is making them really unreasonable.
Dont be a mug. Stand up for yourself. Say no.

Enjoy your new job, in your new home. Get some experience in that job then decide where you want to live and work permanently.

Your sister should be a positive addition to your life, not a drain!

Ok, having read your updates - your sister is taking the absolute piss. Move out!

Ah well, 100 is cheap imho.
She could move somewhere else if she's not happy.

I don't think you owe them anything. It's your sister, not a professional landlord. But on the other hand, she's helping you out and it sounds like money is tight for them, so maybe just suck it up and pay them the £50 for now?

ETA: You're actually paying market rate for a room in a shared house anyway, once the extra things you do are factored in, though, so she's not being massively generous really.

Why ? She’s renting a room in a private house. The going rate here for that is £300-£350 a month, and that includes utility bills. OP is paying more and contributing towards other things, as well as dog walking and child care. Her BiL has volunteered her for the house sitting, which is costing her more, and to top it off her sister has a friend coming to stay in the room OP is paying rent for. They wanted this arrangement and are exploiting it. She wouldn’t be paying much more for what’s basically a bedroom in a private house with a live in landlord. At least she’d get some peace.

Of course you should be paying rent, if anything it should be more.

is that the CF sister? 😆
Seriously though the going rate for a flatshare in the area is £300pcm and is OP is paying £400 pcm so how on earth should she be paying more?

Not to mention the fact she is already “paying more” in terms of paying for Ubers and providing free childcare which comes at a cost to her time and energy.

From your update OP, it seems there’s a backstory here and you didn’t have a normal relationship with her for most of your life. It was understandable you tried to give your sister another chance to basically not exploit you but it’s clearly not worked out.

You’ve had a lot of advice here and presumably from your friends. What are you planning to do moving forward?

On this part you either want to house sit and dog sit for BiL's family or you don't.
If you don't - tell them.
There is no reason in the world why they couldn't have found kennels in time for their holiday or that BiL & your sister move into the house (as it's his family) and look after the dog.

Are you expected to pay for utilities in the house while you're staying there?

There was a post on here recently where an Ex Husband dropped his dog to his Ex Wife's house (she also had kids and cats too look after) and there was a lot of to-ing and fro-ing and eventually he had to sort something out himself for his dog and the OP in that case didn't have to look after the dog. There have been other posts where family members, without consultation, have been lined up to look after houses/pets/whatever without a second thought as to their own plans.

I'd try so hard to find somewhere else to live that isn't with sister and BiL. I'd also cut back on the takeaways and if they want a date night, they can bloody well pay for their own date night. I don't agree at all with subsidising their dating life!!!

Another thing about families and favours - when you withdraw them don’t expect any gratitude for what you’ve done already.
I hope this has been a lesson for the future and you enjoy having your own place all the more; build a social life away from your family as it will be far more satisfying!

Bil parents should be paying you to house/dog sit. And this should cover your rent. So £100 a week.
It will be loads cheaper than kennels for them.

This next few months could be a major game-changer for you. Being proactive about your best interests and developing assertiveness will also transfer across to your professional life.
It is time to step away from your subordinate little sister role and stand up for yourself as an educated accomplished woman. You are more than a useful adjunct to your sister and BIL's life. Reinventing yourself will be lonely at first but bit by bit you can thrive. Good luck for a great 2025!

Of course you should be paying rent, if anything it should be more.

I wondered this. Renting a room in her sisters’ house for £400 a month plus all the extras she pays/babysitting nephews and dog walking seems expensive. A quick google on a lodging website showed that in our area (NW) it’s an average of around £300-£350 a month inclusive of utilities for a room in a private household - live in landlord. OP might find it cheaper and less stressful to consider this while she saves a bit more. I get the feeling she’s being taken advantage of, I think it’s cheeky to ask what her salary is and even cheekier to insist she still pay rent while she’s house sitting, considering BiL virtually volunteered her for it.

Further to my last post - or charge them the going rate for dog sitting and pay rent out of that. Everyone is taking the piss out of you if I'm honest. I'd never do this to my sister

If you want to break this dynamics you need to rent your own place and stop doing/recieving favours.

Get yourself out as soon as possible. Don't wait until after their holidays. Just tell them you'll dog sit by won't be paying them for the privilege.
You also need to stop over sharing generally. They don't need to know about your salary, about the apartments or rooms you're looking at. Keep it to yourself until you've made your decision and committed.
They've taken advantage of you, maybe not intentionally, but that's how it's ended up. You need to make the changes as soon as you can, and then nurture a healthier and more mutually respectful relationship with them for the future.

Don't do it. Just say you can't and then give them some numbers of local dog sitters. Alternatively, ask that they pay you a weekly fee of 100, which will be far cheaper than paying someone for the 2 months they are away.
If you haven't said yes then don't do it.

Go for the 500pm option. You need your own space.

Oh and I'm a bit shocked by your DM to be honest. Fine she doesn't want to take sides, but she is actively choosing to side with greedy BILs family. Was Dsis the golden child by any chance?