Marriage law fanfic where Hermione marries prisoner Snape for her convenience but the tension is INTENSE

Its after the war and marriage law happened. Hermione thinks who would be the best candidate for her and came to conclusion that since snape is in prison, she'd have more freedom as a wife. She makes a deal with snape to convince him and that is to give him any materialistic needs and wants that no prisoner is usually allowed to and he agreed with it.

A little detail is that they can't have intercourse because of a spell that makes all prisoner limp if they ever put their member inside a woman because it is forbidden to be pregnated by a prisoner.

I cant find this fanfic and I truly hope someone knows this! Much love and thankss <3