DP and DSS15 live about 30 minutes way from me. DP currently has DSS full-time, since his ex split from her partner and moved herself and her twin toddlers back in with her parents last year, supposedly while she looked for a new house (in actual fact she seems in no rush to do so, despite her parents getting fed up with her being there).
DSS doesn't like going to his grandparents' house to see his mum, mainly because it's all a bit cramped and tense over there –so he rarely sees her at all now (about once a month for lunch).
DP is at school retraining for a career change while DSS is at school, and works 3 evenings a week. I tend to spend a couple of days per week down there, but I'm usually working and then DP goes to work when I finish, so we don't actually see a lot of one another. So recently DP suggested he come up to me on a Friday through to Saturday as a regular thing so we can spend some actual time together. Turns out that because DSS won't go to his mum's, that means him AND DSS coming up for the night, AND that DSS's girlfriend shows up too, so that DSS isn't just sitting around my house bored and stewing.
So somehow I end up cooking for 4 people / navigating the presence of two bored teenagers in my small (1-bed) house / taking them out for walks or activities instead of actually getting to have some quality time with my partner.
AIBU for wanting DP to tell his ex she needs to step up and do a bit of parenting of her son, so I can get just one evening of quality time with my partner without a teenager (or two) hanging about?