Well i'm 6' 2' and have a built 270lb frame and my my girlfriend is 5' 4' and she is around 240lb. She has an apple type body. Not sure what other detailed you need to know

I know the title is lame, But I hope somebody could help me out here and be serious about it. I have a very nice bbw as a girlfriend and we have been making love for some time now.
I was wondering if anyone could give me any advise for interesting sex position. Because I've alway been on top and latly it just hasn't been that exciting.
The Sex was great for sure, but I want to try new things that is acceptable to her weight. We've tried different stuff, but we would get so tired because of her weight.
So if anyone have a good idea, I would like to hear it. Thank you