Should i put her out?

I live in a one bed room apartment with my man and my baby. My sister moved in with us on thanksgiving day of 2019. And I’m just about to fucking snap. She doesn’t have a job and is not looking for one. She told my mother she doesn’t want a job and she wants everything to come to her. She has been using up EVERYTHING and eating all my food up after i told her not to. She hasn’t replaced anything. Only my bf works because i stay home with the baby. So he has to pay all the bills and get us everything we need and also gives her money for things she needs. Ive talked to her 3 times about this already but she gives me attitude and rolls her eyes and things. She’s only 18 and i don’t want to put her out because she doesn’t want to move back in with our mother. But I’m at my wits end. She also leaves the house in the middle of the night and leaves the door unlocked with me and my 5 month old daughter here alone because my bf works the night shift. She goes in the bathroom and stay in there literally ALL DAY. For like 10+ hours just taking pictures to upload to Snapchat. I have to know every single time i want to pee because we only have one bathroom. 🤦🏾‍♀️ also she walked around in her und while my bf was here and i told her not to do it anymore and she caught an attitude and said they are shorts not underwear. Which is a lie because her pants were on the living room floor and her ass cheeks were hanging out. It’s so much more she does that im tired of i just don’t know what to do. She just sleeps most of the day when she’s not in the bathroom and leaves and comes as she pleases to go party Because she thinks she’s going to be inatagram famous. I’m am TIRED