so irritated need advice

Ren

35wks 5 days and experiencing little bits of everything. 3rd trimester is definitely my hardest. excessive swelling, carpal tunnel syndrome in both my hands, increasing Braxton hicks, the pelvic pressure, anemia just a real trip for me. So the issue is my older brother always insists on me always watching his 2 kids. he never asks he juat calls and tells me plans that he has already made and that I need to watch his kids. he really puts me in a tough spot bcuz despite my s.o. he is my only family close.by at the moment. and he doesn't like being told no. He holds grudges and gets in his feelings when something doesn't go his way. I'm at the point I juat need to rest and take it easy and he i doesn't seem arte to be to that. To make matters worse his children(my nephews) are not the most well behaved kids. they're d

isrespectful don't listen and I just really feel like that's something I shouldn't have to deal with. I just really want to tell him no right now