That's not a contradiction. Again, Big John is not going to win the girls over. If you are hoping for or worried about Big John swooping in and convincing all or any of the girls to get it on, it isn't going to happen. He's also not going to trick them into having sex with him or blackmail them or whatever to take the girls.
Linda is not a girl, she's a grown ass woman with kids. She already has her reasons for letting Big John do things to her. Unless MC does something to change that, it could continue. Does she like it? No. Does she allow it to get what she wants from Big John? Yeah. Will it continue? Make the right fucking choices and it'll stop. Or, maybe you don't want it to stop. Make the choices for that. Will you see that shit going on? No, I don't think so. I don't want to say never, but I really can't think of the scenario where that scene would be necessary. So, NO, you won't see Big John fucking Linda.
Now, I'll admit that a lot of my wording is based on semantics because I know some things which have already been written, while not NTR, are close to it, but also avoidable.
Is there any
straight up by the definition NTR? No. Will there be? No. Will another dick be shown? No. Will another dick smooth talk it's way, or trick it's way, into any of these lovely ladies? No. Will Big John go quietly into the night? No. Will Big John throw some punches? Yes, if you don't make the right choices.