Caught off guard!!! Girlfriend demands direct fidelity test!!!

I wonder if he fucked someone else! Well, I'll put it this way: I was actually sitting comfortably on the couch! Suddenly my girlfriend wrote me a message on her mobile! Her boyfriend was probably already on his way to see me. Under a pretext!!! Great, and now I should seduce him and test whether he cheats?! Suddenly it rings!!! Was she serious? I took my "mission" at least very seriously and it didn't take long until we.....