Redheaded MILF

Holly Holmes is 41 years old and in a happy, if predictable marriage. Her son is at summer camp and her husband is on a business trip around the country leaving Holly to her own devices. Feeling as if she needs a little excitement, she posts her profile on a no string attached website for those looking for anonymous fun in public places, something she has kink watched on PornHub for some time now. She ends up chatting with someone on the site sharing NSFW pics but with no face pics and arranges a midnight rendezvous with the person at a public park. The instructions, go to the benches near the playground, be topless and on her knees and when she see the person arrive, to open her mouth wide to have his cock fed to her. 

Little is she aware that the person she has been corresponding with, is her son, who is not aware it's his mother he's been chatting with until he sees her on her knees and her breasts out. Instead of hightailing it out...he stays and feeds his mother his young cock. Holly is not able to tell its her son because of how dark it is and not wearing her glasses and begins meeting with the person several times a week to satiate her need to suck cock and do so in public places. The more they meet, the more she wants to fuck him even though she's reasoned if she only gives head, it's not cheating.

I would play Holly and your character would be the son, age somewhere from 12-18. We can play it as if she really has no idea it's him, or has a mental block until they begin really talking about it and realizing she kept doing it because it was her son and she is in love with him now. Open to suggestions on the story as well!