My mother wants me to be her Surrogate Womb

Hello, I'm writing here because I was so surprised by the suggestion that I was left speechless and I don't know what to do.

Context: As context: I am a 21-year-old girl studying at university. About a year ago, my mother had to have her uterus removed due to medical problems. This made my mother and my stepfather start having problems in their relationship because my stepfather wants to have children and, obviously, my mother can't "give them to him."

In the end, a month ago my stepfather left the house over this same issue, so my mother started obsessing over finding ways to have children. He even wanted to adopt, but my stepfather said that since it wasn't his, he wouldn't come to love it. Until he got to the topic of surrogacy.

She started researching the topic and saw that it was extremely expensive (in dollars, it would be around 30,000), so who was her cheap option? Yo.

On the same day (10/22/24), he asked me to be his surrogate. Because supposedly I am their only support network and because I wouldn't charge them anything. But when he told me, I felt an overwhelming urge to vomit and cry. She started saying that she wouldn't force me, but a moment later she talked about how beautiful pregnancy was and that she would talk to my university to get their support.

I clearly don't want to have children at this age. Yes, I'm no longer a teenager, but I'm still young and I don't want to ruin my life explaining why I'm pregnant. In addition to this, I take psychiatric medications and an unwanted pregnancy would, in short, make me commit suicide.

So my only options (considering my mother's personality) are: accept and live in depression or get kicked out of the house and not be able to study anymore.

What should I do? I'm really very desperate.

Edit: So, I was talking to my psychologist and, most of all, to my psychiatrist. They gave me several techniques to reject my mother's proposal. A few days ago I finally managed to tell my mother my opinion. I told her straight out that I don't want to get pregnant now, not in 5 years, not ever. I explained to her that if she were to force me I would resent her for the rest of my life and that (if I did) I would even disown the child. Another issue I talked about was that it would be a violation of my rights and that I really didn't want to get into legal trouble over an issue that could easily be solved by talking. In the end my mother decided to accept my rejection of her idea. Sure, our relationship broke down a lot because of this but at least she won't throw me out of the house (bravo). Although I am still going to job interviews to earn money and very soon I will be leaving home. Thank you all for your support, I really appreciate it.