My sister is a sahm and wants me to give her a break.... But I don't really enjoy her children

For starters, is she my sister? Yes biologically. However I was adopted by my two mom's when I was a baby so I did not grow up with her and we didn't even meet until adulthood. So we have more of a friendly relationship. Not a sisterly one. She is a sahm and has 8 kids and I'm sorry.... Her children are terrible. They misbehave and cuss you out. Her 9 year old daughter gave my son a black eye. She used to use her oldest twins for a babysitter but they both moved out together the second they turned 18 and don't help her anymore. So she has 6 crazy kids. She had her 8th 3 months ago and called me saying she really wants a break and if the kids could come over my house so her and her husband can have a few hours of peace and so something together. Last time her kids were here the 11 year old slashed my tire with a kitchen knife as a funny "prank" and my sister never paid to replace it. Her 6 year old son was hitting the toddler and when I tried to stop him he started hitting and kicking me. He even was trying to hit and kick me in my privates. The same 11 year old who slashed my tire for no reason at all BIT my son and broke skin so I had to take him to the hospital because human mouths are gross and if a human bite breaks skin you are supposed to take them to the hospital. I know being a good sister would be helping her because she doesn't have much help.... But when your children are that poorly behaved you can't be surprised when no one wants to help you.... I feel bad. I know she needs this but her kids have physically harmed me, my animals, my kids, my HOME. I don't have it in me to deal with them.