Partner says I’m not tight during missionary…

I wanted to do missionary but we have been having difficulties in that position. He says ever since I got pregnant it’s hard for him to do me like that because of my stomach since he knows there’s a baby in there and then I have aches and pains so he says that’s not attractive either when I’m hurting from moving around.

So then todya he’s like you’re not tight in this position which is surprising to me. It does make sense because I am 33 wks and I think my body is probably preparing for labor in some sense by making it loose down there. Or maybe I’m just losing my tightness idk ;( then he suggests doing levels and I’m like WTF why would I want to make it tight if I’m going to be giving birth soon anyway 😭but maybe if I strengthened my muscles it would make it easier for me to push the baby out idk. ;/ but yea sex has been hard ever since entering the third trimester….