Personally I would just stop replying to her all together. As stated before she doesn't want to get back together shes most likely looking for the "D". And if you give it to her chances are this new girl your talking to will find out about it. (I recall you said it was her roommates best friend or something. I'm sure the three of them hang out occasionally and word will get out.) don't let one round of baby making ruin your new relationship with the other girl. just my 2 cents on the situation...
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