I remember reading a fic a couple of years ago on Sofurry. It was about this human investigator working on... some case and he goes to this possum widow's house and asks her some questions, but gets sidetracked by her booty and they end up fucking.

No matter what I search, I can't find it. The fic might have been removed or something. I do remember it being linked in a Poppy O'Possum thread on /co/.