FSET-420 Sneakily do it with her best friend without getting caught! 7

I want to do something lascivious with my girlfriend’s best friend even if it’s just once, and when I’m fantasizing about it, her best friend glances at me. No way, she likes me too! ? When she was thinking about such a thing, she confessed to me, “I’ve liked you for a long time…”, her best friend. That word caught fire, so I secretly fucked with her best friend so as not to get caught!