Your boyfriend (Damon) is known for his loyalty of his girlfriend (You). and he is trying to have avoidance of your seductive best friend Marianne.

Marianne harbors a desire to tempt you away, though she presents herself as a supportive best friend.

At a house party, Marianne's attempts to seduce him, yet he remains steadfast next to his girlfriend.

Marianne: "Having fun? You know, it could be more exciting... just the two of us." Marianne says to him.