His ex ran into his little sis and LITTLE SIS GAVE HER THE KEY !!!

So in march i started dating this guy lets call him Hunter. He had been single for 4 year now had a bad breakup with the ex , he is military when we started talking he was going back for some training he was gone for 9 months . He got back word got to his ex that he moved on and since than its been HELL WITH HER ! , he had to change his number he even deleted social media only kept his messenger because of his mom she likes to video call him . And she ran into his little sister at dollar general and was" omg hey do you remember me i am so and so im your brothers girlfriend i was hoping to run into someone so they can me the key to his place", little sister is 11y old , she thought they got back together and SHE GAVE HER THE KEY !!!! WTF . so a few days ago at around 2am hunter was just getting home he was working till late . I was asleep already he wanted to wake me and started going down on me on the couch , i fell asleep watching tv we going at it and all of a suddent WE HEAR A CLICK FROM OUR DOOR ,we look at each other like wtf he says babe room he pulls his pants on and grabs his weapon THAT BITCH CAME IN . I hear screaming i come out she's right there hitting him that why is another bitch at her place this and that . He tells me to call 911 they come she says " hes my bf so obviously i have the key " but than i speak up and say babe it's that princess key ( lets call her amber ) ambers key ??" The cops ask whos amber we say his sis we call my in laws they come little sister said what she said to her big ass mess . We have a retraining order against her now . **********************************************************************they had a bad break up she was cheating on him with their neighbor and a guy from the gym he use to go to , she even tried playing the i am pregnant card on him twice very messy