Am I the a hole for telling my sister her girlfriend can’t come over?
For some context I have a sister (22) female and me (17 female). Me and my family lived in my aunts house at first and wasn’t able to have people come over. So when we recently moved I heard my sister talking on the phone with one of her friends trying to invite them to the new house. For a little context my sister cheated on her baby’s father 7 time and every week has a new girlfriend or boyfriend and meets them off the internet and was kicked out of her baby’s father’s house. So she is not allowed to have people come over unless she has been with them for 6 months due to my nephew and not wanting weird people in the house. My mom lifted the rule one time because my sister claimed she would sleep in my mom’s car with this girl so my mom let her stay for a few nights. My sister and her baby’s father are coparenting so when my nephew was getting dropped off it caused a big argument that the girl was even over and the girlfriend is not allowed around my nephew. Back story on the girlfriend her and my sister has been off and on every time my sister gets paid she gets back with her then breaks up with her when she has no money so we did not like this girl from the start. So after my sister had to take the girl home so my nephew can come over I had found out that the girlfriend was dating a 16 year old girl at 21 years old and told my sister that it was the past and then come to find out she told my sister the 16 year old girl lied about her age and then I found out the girlfriend also cheated on my sister and now my sister is claiming it was a mistake and asked if the girlfriend also cheated can come back over here. So after the long message asking if the girlfriend also cheated can come back over of course I told my sister of course not and that I did not want to feel uncomfortable in my own home and which everybody else in the house other than my sister agrees with me and thinks she should not come over again. Now my sister is claiming we all hate her and saying she rather stay at a homeless shelter because she’s not allowed to have the girlfriend come over. And now is bashing everyone on the internet. So am I in the wrong?