Me (F35) and my partner (M44) have been living together now for just over 1 year (been together 3 years) and have recently welcomed a baby girl who is 7 weeks old. I own the house we live in and my mother lives with us (always has). My partner has 4 other kids (m14-stepkid, m12 m11 & f10) and it drains on me and my mom when they have to come and stay, which is every Tuesday and every other weekend (though it feels like we have constantly had them recently). His 2 younger kids have Austim & ADHD and they are very tiring and have constant tantrums. The main one is going to bed/sleeping and the other is they refuse to wipe themselves after pooing (which i find revolting). The youngest (f10) refuses to go to bed (every night) and is very loud about it. My partner's ex has just recently took a week holiday (without the kids because she needed a break) so we had them for a week, and it nearly killed me. My baby was only 2 weeks old so wasn't great timing. She has now asked to take the 2 younger ones away for a week separately, so 1 in May/June and the other in september, so we would have to have the other one for a week while she takes the other away. WIBTA if I asked/told him if he says yes to this he will either need to take the kids to his moms to stay or stay at his exs with them?

EDIT - Just so you are all aware. We have been together for just over 3 years. I wasn't introduced to the kids until 2 years in & the kids didn't start staying at my house until 6 months after. Which at that point I was pregnant.