Help!Photos taken on my mothers phone show up on my ablum! Why

Help!Photos taken on my mothers phone show up on my ablum! Why About a week or so ago,pictures from my mothers photos started showing up on my album stream.This started around the time I update to the iOS.9 and if I where to delete something it would be deleted on my mothers phone and the same goes for me.I really need help. ANSWERS:
Asked by: Guest \| Views: 258