There are size queens for sure, but not every woman is one. Don't dwell on it with her, a lack of confidence is a turn off and it will only make the conversation harder. In a bar fight it's the little guy you worry about. Big guys walk around all confident because they win by intimidation. The little guy, he wins cuz he's a fucking monster. If you are the little guy, be the monster you were the first time you fucked her. Remember when you had to have her and you fucked her so much you thought your heart would explode from the exertion? That's where you live. All in. Max effort. Make the big guy work to match you. She's your wife, he will only ever be a dick. Fun diversion nothing more