Source
Ya Fluttershy brother

5081354 For season six I presume?

So anyone got ideas on how this is going to play out?

5081650
1. She find out she has brother given she told her friends that she was an orphan.
2. She is deal with remarriage from her biological father/mother to her step father/mother and she is try to get to know her new brother

5085453 Or he could be the opposite of her and they can't stand each other.