I'm 21, my sister is 27. She's in a lot of debt and I've left an abusive man so we've found ourselves having to move back into my mums house at the same time. My mum is a carer for my younger sibling (severely disabled and prone to aggressive meltdowns)
I have no Dc's but my sister has a 5yr old son (who I do love very much).
However, she keeps dumping him on me. What I mean is, I'll say, get up at 9:30am. While I'm having a shower or a coffee in the garden or something she'll go out (alone) leaving her son here. He'll either come and find me or I'll go in and see him sat alone on the sofa. I then have no choice but to look after him - I can't leave it for my mum to do as it's a 2 person job to look after both children (my younger sibling and my nephew) as if my younger sibling has a meltdown it's impossible to keep my nephew safe if you're alone. My sister then wont return until between 3 and 7pm. The few times I've brought it up she insists she "had to go out" but when pressed admits she just went to the sunbeds, went for coffee and then picked up £20 worth of tat from a bargain shop. She won't apologise and keeps doing it
In the last 2 weeks it's gotten even worse, and my sister has even said I don't do enough around the house. She doesn't either because she goes out (to various places) at least 6 times a week and I'm knackered from looking after her kid anywhere up to in excess of 35 hours a week. And of course, she doesn't pay me.
Things have come to a head this week because she's got a wedding to attend on the weekend and her planned childcare has fallen through (3 weeks ago) But I'm meant to be out this weekend. She assumed I'd be home and is now absolutely incensed that I've made plans to go out. The thing is though she didn't even tell me when her plans fell through, she just assumed I'd be here to look after her son for 2 nights... I don't want to back down but I'm finding it hard to cave.
This is effecting my mental health and even though my plan is to study from September on I honestly just want to move out (tough but not impossible) and go back to work so I don't have to deal with it anymore. It feels like I've gained a child I'm looking after him so often and with such short notice but he's my nephew I don't think I should be expected to do this.