Baseless or not, he's in the right there. Jokes are all about timing and context. If both aren't comfortable with them, they're just for your own satisfaction, which makes you either selfish or mistaken. If you defend yourself, it's the former.
Her follow-up is good, though. Shows she's not the jealous type, which helps trust. Well, she's probably not entirely serious about it, but at least she can joke about it.
Monopoly isn't quite so bad if you actually play by the rules, and not use house rules that only prolong the suffering.
Why would you even react at matching mugs? It's common to have two or more of a matching design. That's just how you buy things normally, unless you're specifically just buying one for yourself.
Likewise, if you have two controllers, you often have one charging and using the other. It's not weird at all.
Bro's a bro at coming up with those explanations, though.
It's not arrogant to want something good for something else. I find that she's often thinking positively about bad things and negatively about good things.
Wholesome ending.