So, wrestling with her and sharing a room with her on holiday ... that's OK now? There's nothing "Platonic" about this even if there isn't actual copulation. There's no way that this guy would feel the same way about some male friend of his, and that's the clue. So he wants to keep the "friendship" despite the fact that he claims to want to keep his wife happy and "comfortable" ... even though it clearly makes her unhappy. So he's amazed that his wife is "jealous" of this relationship?
No man or woman should have a particular friendship with a member of the opposite sex who is not at the same time their spouse. Period.
He claims that he wants to make his wife happy, but is a liar because he doesn't care about hurting her. If you don't want to hurt her, you don't do stuff like this.