Okay, so let's say your significant others' sibling just got engaged and plans on moving in with their fiancée. The sibling's current roommate are all the same gender that your SO is interested in. They offer to let your SO move in with them, and he/she is considering it because of cheaper rent. All of the roommates are in relationships. Also, one of the roommates may have a slight crush on your partner. How do you feel about this situation? And how do you confront your boyfriend/girlfriend?