You Man Is Shacked Up With Another Chick

My friend (Theresa) lives with her guy friend (Tommy). She rents a room from him. They live together in a two bedroom house in Manchester. Tommy has a girlfriend that he has been going out with for the past 8 months, lets call her Melinda. Melinda has an 8 year old little girl and they come up to Manchester every other weekend to visit. Melinda and Tommy are kinda serious. So serious that Melinda suggested to Tommy that they move in together. Somehow a misunderstanding occured and Melinda was under the impression that Tommy wanted her to move in with him.