To not want to look after siblings any more

[Carla95]

I’m 23 I’ve got my two kids aged 2 years and 7 months and my Mum decided to re marry and have more kids so I have 3 kid sisters and she asks me to have them while she’s at work and I’ve been doing so for years but tbh she takes the absolute piss and they’re awfully behaved and it’s too much stress for me so I’m going to tell her I don’t want to do it any longer.
I do it for free when my brothers OH gets paid but tbh even if I got paid I would still want to quit. I just feel like I can’t say no because they’re my sisters but I have helped her so much through the years and she’s not done the same for me it’s a one way road and she doesn’t make it easy considering I’m constantly helping her and doing her favours!

From what you say I don't think YABU. How do you think she will take the news and does she have alternative childcare?

No OP. YANBU. and wether your mum has alternate childcare options- isn't your problem to sort out. It's her and person she decided to have children with!

Not an easy conversation though. Good luck !

Tell her that with your own 2 at the ages they are now you just can't manage hers as well. Don't present it as something to be disguised just as the rock solid way it is.

Just tell her no. Give whatever explanation you like. Her childcare issues are not your problem.

Ask her to look after your 2 on the weekend. I bet she will say no.

Give her an end date to the arrangement. I think 2-3 weeks is more than enough reason. If she asks, tell her it doesn’t work for you anymore

Just tell her its too much. Give 2 weeks notice. Don't feel guilty as she doesn't return the favour.

She is really taking the piss.
Give her 2 weeks notice or your summer holidays will be a disaster.
Don't change your mind, Your DM will know how to get around you, stick to your guns.

Tell her YOUR children need you and you have helped all you can. Agree with the others, give a 2-3 week notice. Don't fall for the emotional blackmail either - as you say you have helped her enormously and its been a one way street.

Give her reasonable notice in an email and if she turns up after that don't answer the door.

YANBU. Not your children, not your responsibility. It won’t be easy and I would expect it to cause tension but you’re not her nanny. You have your own DC to focus on.