it won't be ntr or sharing I'm pretty sure they thought of a way around it being cheating since as of rn she's still with his father but they don't wanna break up characters or put divorce which will be hard because of those relationships but they'll figure it out I have faith
Rita and Lynn Sr will not split up. The Rita content is completely optional. Lynn Sr will not know of anything going on between his Son and wife.
Rita won't see it as a betrayal of Lynn because she still loves him and wants to have sex with him... She'll just see things with Lincoln as a new way of "Mother/Son Bonding."
If you don't want to deal with any of that it's why the Rita content will be completely optional.