M4F - Birthday Present

The idea I am about to present stretches reality. It is one of the main reason why I would like to explore this idea. This scene involves multiple characters. Specifically, I am looking for someone to play as an open-minded, sexually active mother. The specifics of the play and how it plays out can be worked out later.

After the father left, the son took his place as the man of the house. He helped his mother with everything in the house such as the bills, the chores and more. For the past couple of months, they started to share a bed. Both of them didn't mind it at all. They loved it.

The son's birthday was coming up and the mother wanted to do something special for her son.