Nude pics and pregnant

Im 6 months pregnant with my 1st child. And i wonder can any other woman relate. My baby father ask for nude pics and all..never ask for a simple pretty selfie..i feel some type of way and totally uncomfortable doing so for many reasons including the fact Obviously my belly is big, i dont feel like sending nude pics...He also cheated and chose another female over me right when baby was conceiving..so my trust issues is sky rocketed. I just feel so wrong about it.. Whats your thoughts?