Only PJ is Bob's child. The rest of them are all someone else's child. It would be a different man every time.
Look at the eyes, look at the hair.
Both Bob and Amy have blonde hair and blue eyes. Which means every one of their children should have blonde hair and blue eyes. Only PJ does.
So, Teddy, Gabe, Charlie and Toby are all not Bob's biological children.
He, of course, would probably be fine with this. Bob seems to be busy a lot, Amy works at a hospital, they might not have the most time to have sex with each other. They obviously have some sort of a sex life, with the way Teddy comments on it. But it would seem Bob and Amy don't often have sex when conception is possible.
Bob is such a tall, massive man. He must have the confidence that he would be the best, or at least one of the best of all the men she would ever have. He must be fine with letting another man take care of Amy, occasionally or quite a few times. He wouldn't have any problem with Amy fucking around with other men when he knows his own skill.
Amy's dominant personality would be good with that sort of relationship. She would have quite the easy time getting men, she would easily be able to approach them and get them to have sex with her. She would be able to get more submissive men and dominant men a like. Younger men that want to be used by a MILF. Men who wanted to take a dominant woman and try to put her in her place, maybe that was it, maybe they wanted to have the tables turned on them. Men who just wanted to fuck. Men who have wives that they're not satisfied with in the bedroom. Men who wanted to fuck a cheating, married woman. A lot of different types of men. Maybe it started in high school. Maybe after that.
When they had the time to have sex, Amy would probably tell Bob about what she had been doing in with other men. This might encourage Bob to fuck her harder, hearing about the way these men fucked her or used her, to reclaim her in a way, as a fetish thing. Or maybe he just got turned on so much, hearing about what Amy did with other men and he fucked her harder because his mind was telling him too.
They might not care, the first time Amy got pregnant and knew that it probably wasn't Bob's child in her. Or maybe there was a slight caring, but they go on with it, because who needs to know? Nobody, it wasn't their thing to care about, it was Bob and Amy's thing to care about, and they didn't.
But they might use it as lustful fuel in the bedroom. Some other man got her pregnant. She could tell Bob that in the bedroom and it would encourage him to fuck her better. Or harder. Make his cock stay erect after one or two orgasms. She could tell him no matter how much cum he put in her, he could not get her pregnant, she already was by someone else, and no amount of cum would change that. He would have such powerful orgasms, knowing that he was cumming only for pleasure into his wife.
They wouldn't have as much time with children to do these things, but they'd still find some time. Gabe would probably come along from another affair that Bob knew of. Gabe's dark hair would make it obvious that the two blonds wouldn't have this child, that Amy would have gotten pregnant by someone else, but Bob wouldn't care for the looks or the questions that people wouldn't ask.
Again, it would take a while before they did this again, and then again on a possible trip. Bob would get to watch, maybe, this time, because they booth would have more free time to do things on the trip, while their children were busy
"Don't have too much fun." But they did, and that was that.
