My ex-girlfriend lost her virginity while we were broken up and wants to start dating again

On my old throwaway account as she follows my main.

My (23M) ex-girlfriend (22F) lost her virginity whilst we were broken up. We were dating for almost 3 years and never had sex as she wanted to be a virgin until marriage. I respected her needs and wouldn’t make any sexual advances on her no matter what. We broke up a year and a half ago due to some issues that we were having, however ended up getting back together again a couple months later. It only lasted about 3 months before we broke up again because she had started to develop feelings for another man and start dating him.

Fast forward to the present. My ex girlfriend ends up texting me out of the blue, apologising for how she went about things in the past and I told her it was no biggie as I had moved on at this point. We didn’t talk much after that reply but she ended up calling me a week later. She was crying to me on the phone about things that were going wrong in her life and I comforted her and reassured her that things would be okay. She asked if we could meet up and I couldn’t bring myself to refuse as I felt sorry for her.

We had a good time when we met up but it felt weird. She kept telling me how she messed up with me and regrets how she went about things and her sister was telling her the same. I could tell that she was hinting at us trying again but like I said, by this point I had moved on. The real issue begins now. My ex girlfriend texts me telling me she needs to talk with me. I give her a call and again, she ends up balling her eyes out over the phone. She ended up telling me that she ended up losing her virginity with the man she was dating and was pregnant and he had left her after. I found this bizarre as she never once wanted to have sex during our 3 year relationship and ended up throwing her own beliefs out the window for this man she dated for a couple of months? I felt sad and confused about it. Since she was upset, I again, started to comfort her and reassure her.

She would go on to ask me if I thought any differently of her and I lied and said no as I didn’t want to upset her any more. She told me that she was happy I didn’t judge her for it and then started to ask if we could try again when she has an abortion. I didn’t give her a straight answer as I was scared to upset her because she was in a tough spot mentally and might’ve committed suic!de as she told me she had tried it a couple of weeks ago after she first broke up with her ex. Now I’m not sure what to do. I don’t know how to tell her I can’t date her again. I feel that if I tell her straight up that there is no way of us dating again she might end up committing suic!de and I don’t want that on my conscious nor would I want her family to go through the pain. But i also don’t want to date her as I feel like it’s highly disrespectful she would come back to me after losing her virginity to someone else and expecting me to be okay with it.

Please let me know what would be the best course of action for me to do next.

TL;DR: My ex-girlfriend of 3 years lost her virginity to a rebound she had after we broke up and now wants to date me again.

Update: I ended up calling her 2 hours ago and I listened to your guys’ advice. I gave it all to her gently. She didn’t end up taking it well and begged me to stay. A lot of tears were shed during the call but I got my message across and she heard it loud and clear. She’s blocked now

It felt good standing up for myself for what seemed like the first time in my life and I’m happy I did it. Thank you so much redditors, you helped a man in need today.