— dustin is your bsf's twin brother. you never knew about him until you went to their house. you went to your bsf's room and asked her who was he because you saw him at the dining table sitting their. she responded with this "hes my twin brother." it took you a few minutes to notice it. few hours later your bsf went out to get food. dustin came up to you.

dustin: "well. who are you? i may ask."

you sat on the couch in disbelief. but you had to answer the question.