Is it normal that i want to beat my mom?

A few weeks ago my mom had a male friend visiting that is around 45 or 50. I went downstairs to get some food and she started yelling at me to go back upstairs to my room as the dude just sat there and watched. Awhile later she shoved food at me and I returned to my room. About an hour later I went back downstairs I went to get a drink and my mom put on loud music and the dude started dancing like a god damn idiot and started rubbing up against my back and I started screaming at him to bloody stop and I hit him and he just yelled "oh come on!" and he didn't stop until my mom told him I don't like to be touched. I told him fucking clearly that I don't want to be touched why did he only listen to my mom? did I mention that he was also calling my older sibling sexy? After I just ran back upstairs to my room. A couple hours after that I went downstairs to get a drink again and and my mom told me to go back to my room for the second time. I waited a few minutes before going downstairs again to see the dude's boots on the floor and his stuff on the dishwasher. the bathroom door was locked and the lights were off in there and loud music was playing on the radio and the kids (one six and one eight) were in the living room on the same floor...I started to have a panic attack...I knew what she was doing so I just quickly got a drink and ran back upstairs and told my older sibling. They told me to try to ignore it. a while later my sibling went downstairs and knocked on the door of the bathroom and asked what was happening in there. my mom said she was just going pee and she said the dude went to the store to get us more soda. we already has two 2L bottles of soda so I don't see why we would need more. my siblings said "then why are his shoes in the middle of the kitchen floor?" mom replied with "he wore dad's shoes"...bull fucking shit this dude was wearing his shoes the entire time he was there why would he take off his shoes and put on my dad's? my older sibling just went back upstairs and I returned to my room. About an hour later I heard screaming and banging downstairs and I ran downstairs to see my sibling trying to break the bathroom door open and a few minutes later my mom who I now refer as "the whore" came out of the bathroom with the douchebag...She was holding a bottle of lube and my sibling was about to beat the shit out of the douchebag but they called the cops and the dickhead pussied out and left. When the police arrived they told us to avoid talking to each other until my dad got home from work. The whore said to us "I didn't know doing that here would upset you..." WELL NO FUCKING SHIT SHERLOCK IT'S GONNA UPSET US YOU DIPSHIT. she tried to hug me and I almost puked...I don't know where her hands have been. and my older sibling texted my dad telling him what the whore did. Now she's spending money on that ass and we barely have any food to eat. and she's also blaming me for her infidelity. I swear I'm gonna end up hurting her badly.