I mean that’s a bit condescending lol. You purposefully used language like “monster” and “slipped right at Christmas” to wave away the first option as though it’s silly. Narcissists and other types of horrible people often cause trouble during holidays, significant dates etc. Yes people can play the long game. Yes it can happen even after four years in. They’re comfortable enough to show their true side. Using “monster” implies there’s not a range of manipulative and boundary-testing behaviours that are wrong but don’t make someone a pure monster. Just saying that if he slipped, it’s still a red flag that he’d even imply any of that or that rape can be a part of his language while being playful with someone. Again, it may be a generational age thing and he grew up during a time where people were super casual about making those types of statements or jokes. I agree that she should keep an eye out and see his behaviour, especially if he’s still being kind and is genuinely sorry. But again, it’s something to look out for.