whimsyofemily Let them be and try to communicate about it with both parties. This is always a hard situation to be in. Don't force your sister and Yeazy together. It sounds like because of your awesome family dynamic you have some false expectations for how your significant other and family will get along. Just because you like a guy doesn't mean he'll click perfectly with your family and you can't expect him to "click" with your sister. Could you set some boundaries with your sister perhaps? Could you ask Yeazy what would make him feel more comfortable in that situation? Maybe you and Yeazy could come up with a signal to communicate I need help in this situation. It's awkward and nerve wracking for a lot of people to meet their significant other's family no matter how strong their feelings are for their boyfriend or girlfriend. My vote here would be option D. Accept that Yeazy and your opinionated sister are different.