My Son Took My Place

I work away for a month at a time then home for ten days, i came home a day earlier than normal, nobody was at home, i decided to have an hour in bed, i noticed two people ha slept in our double bed, i thought my wife had a lover, i checked tor bedding there were signs and smells of sexual activity so no doubt about somebody was fucking my wife while i was away,
i noticed my sons bed had not been slept in, new clean sheets on his bed, i first thought he might be away but no he does not go away, then i thought no not the ultimate taboo, was he fucking his mother, i had noticed a difference in there body language to each other i thought it was because they were together more, i have seen him give his mothers bottom a playful smack when he thought i wasn't looking, she seemed ok about it, i kept thinking about them together naked with his dick in his mother, i got a hard on think about them fucking, i thought why not ime away a lot its safe in the family, My wife arrived home and couldn't hide her surprise at finding me home early, we greeted and she made ah excuse she had to change the bedding and rushrd upstairs. believe it i didn't mind
i had many pleasant thought about them having sex.