"I have as much right as home owner here" It's your sister's house not yours, you piece of shit.
"our property" not yours you deranged entitled monster.
Im actually fine with the dude he’s TRYING to do what he thinks is best (although his judgement is very…awful) but this sister is like!!!!! UGH, seriously??? Threatening her??? And you know she isnt doing this for the good of her sister either, she’s just negative vibes incarnate!!!