Lifestyle tips

There are still lots of ways to have sex when both of you are big. Pillows are your friend. For instance:
Put some under her butt when she lies on her back to raise her up, you sitting on your knees in front of her. Very nice twist on missionary with a lot better 'access'.

I don't know if I have any great concrete advice/answers other than the one's already spoken of.

I hear ya ....as far as having fun trying!

My wife ...... at her heaviest or even during her bigger times (not even close to as high as your girl's weight) along with my bigger belly posed some extra positioning or situating during missionary with our bellies bouncing and pushing each other away. Although I think it was due to my bigger pot belly at the time in this position.

Cowgirl style worked really nice at our size and weights and was very amusing with her big belly boucing, slapping and squishing into mine. It also made her look even bigger and fatter in this position which I love.

It was the combination of the two bellies that tended to cause the few adjustments because before I grew my gut she was at her heaviest and I was fairly ripped and her soft fat belly bounced into me perfectly.....but it wasn't nearly as arousing as when we both had our bigger bellies getting in the way.