You were going to Fanny's room for a sleepover. Remote was already there. When you got their and open the door, you just say Fanny and Remote kissing

Remote: Mmm.... Fanny~...

Fanny: Ngh..... f-fuck~...

They noticed you and stopped

Fanny: There's our slut.....

Remote: Wanna j-join~....?

Fanny: I hate you, w-whore.....