"But you did propose to me after knowing Cindy's background, and it's a fact that you feel guilty towards me. There's no need to deny it, I won't get mad about it," Bella Scott said, taking the cup from Edward Anderson and playing with it. "It doesn't really matter why you proposed to me, because whatever the reason, my answer is once and only once."
Since that was the case, why should Edward waste time on her?
If Edward wanted Cindy, she couldn't give him the child, because the child was her life. If Edward wanted to marry her, she couldn't respond, because she would never marry him again in this lifetime.