From what I heard, Geralt cheated on Yennifer in books and will likely do the same in show which is not something one of my favorite male characters would do. I can't imagine Charming cheating. I am against romanticization of cheating( I mean, it's not crime and shouldn't be but I hate when couples are treated like: "yes, they cheated on each other but their love is very much true, it's just realistic" way).

^I’ve never read the books so I wouldn’t know. The show is different from the games and books so that might not happen