Or I can convince her mom to stay with her...

Mrs Granger is in distraught after her husband died. You feel that this is the best way to break into Hermione's circle as she is very secretive. It will not be easy to break her. Mrs Figg also feels that it is the best course of action. If only Hermione touched your cock or the "milk" Mrs Figg laid out for her, it would have been a hook-line-sinker moment. Life ain't fair, isn't it, Mr Potter.

You think about what to do with Hermione while Mrs Figg couldn't resist herself and began gobbling your cock in the background. Turns out you were able to think much clearer than before, as the curse began to tingle your cock and unblocked how it happened. You were at the Malfoy Manor escaping from the Lestranges and Malfoys. A spell was shot straight at you and when you disapparated with Dobby it hit your cock. You got a glimpse of who may have shot but after that it becomes blank.

"Hmm... I need to explore further... Maybe if I had more sexual activities it may work.."

You then began using Mrs Figg, ramming onto her as much as you could. Unfortunately, it didn't help in revealing who it was. You then drop that matter and continued fucking Mrs Figg until it's time to visit Mrs Granger.