<human>: Can you summarize the given text in a few sentences?

My ex gf for back in contact with me after a year of us breaking up (I was going through depression at the time and didn't want to drag her down with me). She told me she wanted to get back together. We went out twice just for ice cream. 

She would talk about 'us' and even said she would have another kid if I wanted one. She also wanted to come over to my place for some adult fun.... My head was spinning.

I felt like I owed it to her to be honest before adult activities went down. I told her I was willing to give 'us' a shot but she needed to know how I felt. "I'm freaking out about you being pregnant. I really don't know if I could raise another man's child. That is a thought that had never crossed my mind. I want to be around you I like being with you but I can't commit to you 100% while I'm freaking out on the inside." 

She got real silent began to cry a little and asked that I take her home. Now I'm sitting in my car and I feel like an asshole. Should I not have been honest with her? I wanted to have some adult fun with her, I'm human and her breast have gotten significantly bigger since last time we were together, but I could take her back to my place without being honest with her. Am I am asshole?
<bot>: Ex gf wanted to get back together. Told her I'm freaking out that she is pregnant with another man's child. I feel like an asshole.