Quick question, is it possible to have sex with the rat lady? If so, how?
Hahaha. That's what every guy in the world wants to know about girls xD I heard rumors you need to talk to them first :D
But serious answer is: Once you lick it says you need 25 relations. Gif her gifts until she wants to fuck. Once you have a gift in your inventory you can offer it to people during a dialogue. Visual novel logic xD