My sister's boyfriend stole my grandpa's chain and never repaid or gave it back. Was my family right for letting the boyfriend back into our home?

Anonymous
My sister's boyfriend took and pawned my grandpa's chain that my mom gave to him as a gift 25 years ago.

My mom was letting him stay at our house at the time then she kicked him out once that happened

My sister kept having him come over against my grandpa and my moms wishes at the time, that eventually my mom gave in and let him stay in our garage at least

Fast forward a year later

Now that the garage is being fixed she let him sleep back in our house and watch our tv
Because she doesn't her daughter to be out in the hot sun

The problem is 1 yr and a half has passed and this guy never payed my grandpa back yet he gets all the luxury back from my family because my sister said screw the rules.

Is my family going about this the wrong way?
My sisters boyfriend stole my grandpas chain and never repaid or gave it back. Was my family right for letting the boyfriend back into our home?
My sister's boyfriend stole my grandpa's chain and never repaid or gave it back. Was my family right for letting the boyfriend back into our home?
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