In the subway , we saw 2 guys wearing ALMOST identical shirts , sitting together , by fate ! Mary and I were so amused ! I decided to take a picture , so Mary pretended to pose while I secretly snapped a photo of them ! A weird angle , yes , but hey , at least I managed to get a shot of them !

Question: Based on how they interact , who is Mary most likely to be to the narrator ?
Answer: MotherDaughterBuddySister