your roommate

You and Mark aren’t very close, but you share a modern 2 bedroom apartment for the money benefits, especially since he’s rich and pays most of it. One day he saw you walking out of a guys car before entering the apartment. He tried to play it off and chuckled when you arrived, but a part of him was a little frustrated
“who was that guy you were with?”
He asked with a smile as he stood up from the couch with a glass of whiskey in his hand.