I was horny most of the time during my pregnancies. Being on Bed Rest and "not supposed" to have sex put a little damper on it, but we managed gentle sex (with amazing orgasms) with an aspirin chaser to dull the contractions.
My husband thought I was sexy as hell when I was pregnant. I think part of it was because it was "his work" and part of it was the blossoming of our Love resulting in my body changing to grow our babies. The huge boobs and bigger butt didn't hurt, either.
He even liked the preggie-belly. He said I looked "ripe" "tasty" and "sexy." And I was as juicy as all get out.
The only thing was when the baby would kick him when he was on top. Or when we were side lying face to face. That kind of freaked him out the first few times. (Not that it stopped him or slowed him down.) I made it clear, "The baby has no idea what's happening, he or she is just responding to the extra blood and oxygen supply to the placenta." Yeah. I can talk filthy!