Fat girl positions.

Nichole • I'm 25 years old. I've been in a relationship with my SO for 7 years and we have a Dom/Sub relationship.
I've been with my fiancé for 7 years and I'm finding it difficult to bring back the spice in our sex life. I'm his "baby girl" the problem is I'm just not little. 
I find being on top extremely difficult, and I hate doing it because my thighs don't spred like that, and I've had surgery on a leg that makes bouncing on top painful. 
He's got a little bit of a belly but my tummy and thighs are always in the way. I hate making him do lol the work but I can't seem to find a position that is pleasurable to me (besides doggy and missionary).
Any other Big Beautiful Women out there who have figured out some new moves to pleasure their man?