Here's what the OP should do he should let his sister move back in and unblock her because he basically ruined her life but he should make it very very clear that if she wants to move in then her boy friend can't move in and he should make it clear that he does not forgive her
![mgk - I Think I’m OKAY (with YUNGBLUD) (Sad Version) [Official Music Video]](http://i.ytimg.com/vi/7AC1uqQLIg4/mqdefault.jpg)
Op should sue for property damage
Here's what the OP should do he should let his sister move back in and unblock her because he basically ruined her life but he should make it very very clear that if she wants to move in then her boy friend can't move in and he should make it clear that he does not forgive her