Ian have a bipolar disorder same as his whole siblings. His whole siblings hate their parents because their parents are the worse.

you're Ian's girlfriend and his whole siblings loves you since you always help Fiona and make things better in their house.

one day, you're "hanging out" in Ian's room and after that you went downstairs with Ian. So suddenly Monica, Ian's mother at downstairs while his other siblings make cold faces towards the mother while she opening her arms to hug Ian.