It's wrong to set ultimatum to those you love
Olga is suspicious of the close relationship her fiance Paul has with his ex-girlfriend.
Olga wants Paul to spend less time with his ex.
Olga explains to Paul that the amount of time he spends with his ex makes her uncomfortable and asks him to please consider how his behavior impacts her.
Olga tells Paul that she will break up with him if he doesn't stop hanging out with his ex so much.
Paul feels bad seeing things from Olga's perspective and and complies with her wishes.
Paul agrees to distance himself from his ex, but he dislikes Olga's behavior and this puts a strain on their relationship.