My mother just flat out sucks

Angie • I'm a feminist/ally/cat lady/theatre geek/Disney child/thalassophile who is in love with her bf❤
My sisters, brother, mom and I are in a FB message group together. My oldest sister asked if I was still with my boyfriend and I said no then the other two sisters started talking to me about it and after a few issues they wanted to discuss with me, everything was fine. Then my mom decides to pipe in two hours later and is pissed because she thinks without my ex I'm going to be a porn star, get STDs, started naming off all the bad shit I've done in my life that my brother doesn't know about and that I can't function without him. I'm a 25 year old woman who's living with my best friend working two jobs all without a car. I believe I can take care of myself. But my sisters flipped on my mom because my brother is in the group and he could see what she was saying so they deleted the thread and started a new one. I'm so furious at my mom. I hate that she thinks I lack the common knowledge to be able to take care of myself and she treats me like a rebellious 13 year old and I can't stand it. I'm just so done.