It's an interesting fantasy to paint such a fat ass green! Ladies with such an ass are especially good in the crawl position, a boner is assured. Except you have to have a decent length tool. If you don't have one, I recommend laying the lady on her back and fucking her with your hands on her thighs pressed up against her belly. Otherwise you can't get the dick in deep.
It took a long time to undress, but when she started fondling herself, it was something to see, especially when she spread her long legs. She masturbated her pussy very hard and cumming hard, poor girl was just tossed around by waves of orgasm.