Sex....weird or not?

Tavia • Mama of a 7 year old and 4 year old. Expecting baby number 3 in November 2024.
My SO and I haven't been as active since we've gotten pregnant. Partly because he works such long hours and partly because I'm too worn out from pregnancy. When we are intimate, I can't help but feel like there is a 3rd party watching (baby in utero). A little tmi- I usually like nipple stimulation but now I can't help but think "these are what I'm going to feed my baby with". I kind of feel grossed out by getting turned on or I can't get turned on because now I associate breast with babies. Am I alone??