Errr My Sister Makes Me Mad! Kinda Long Sorry

Sorry this is so long but im mad lol

ok alma is 18 and her daughter is hope (soon to be 2 in oct). So anyways youd think shed learn but nooo. She was dating this guy abel. Hes the biggest tramp ever. He sleeps with everyone. And ive known him a long time and he tells me what he wants from girls. Even when he met me he wanted to get laid, but I never let that happen. So alma became friends with him, then I guess one thing led to another and she was coming back with hickies and spending the night at his house, while my mom watched the baby. Alma knew what kinda dirty guy he was!
Then he got beat up and decides to move to sacramento (4-5 hours away) and she even drove out there to stay 1 night at a motel with him. I was fuming and yelling at my mom because she lets my sister have her freedom yet when I was 18 I was on lockdown. I couldnt see jose alone! And she lets her get a motel, while me and my mom watch hope the whole time!!
So then comes his turn to visit his family (they live 10 houses down from my mom) and do you think he calls her?? No! She called him like 8 times and not once did he stop by to see her. Or call her. So she got mad. Then he did that 3 more times and his step brother even told us he had another girlfriend already! And he was with her at the moment! So youd think my sister would learn she got kicked aside! But then 2 weeks later he starts calling her again and she falls for it. She says its cuz "she has no friends" so shes planning on driving out to see him again next week!!! Im so mad because none of us like him yet my mom is letting her go! At first my mom said no but then my mom was like "ok give me $100 and ill babysit" so my sister is giving her the 100!! Dummy, just to see him!!!
Errrr I wish I could knock my sister upside the head and tell her to stay home with her kid where she belongs. This is what happens when she has kids! Thank god shes on the shot! I said if she wants to go anywhere she should pack her daughter up and go, not leave her here. Now I have to watch her too! Errr. Im mad now.