Here are some ways to help you prevent him from having an affair ~
Standing in the center of your home, it is better if the living room is on left hand side and the master bedroom is on right hand side. Lady of the house can have better control on issues.
Place a pair of lion figurine in the hallway or by the door leading into the living room. This will facilitate successful career for the man of the house and reinforce appreciation for the lady of the house.
Have your man sleep on the side of the bed closer to bedroom door, and you sleep closer to the window side of the bed.