I just wanted her to sit on my face

I was in a committed relationship for 10 years. My BBW ex had a huge ass, all I wanted her to do, just one time was to sit on my face, she would never do it, no fuckin clue why, i think she was scared of crushing me, but I told her I can take it. Her ass was so inviting I would put my face in it, she loved when I would fuck her and play with her tight asshole. I used to eat her ass & pussy like ice cream. If I could time it right I would pull out, cum in her mouth a little, make out with her to get some nut in my mouth, then go back transfer it to her asshole, then fuck her pussy till I fully came. But I just wanted her to sit on my face, is that to much to ask?