My friends cousin?

Whenever I see my friends cousin she is always very flirty with me. She is much younger than we are. In fact I bought Girl Scout cookies from her at one point and I watched her grow up. She is in her early 20’s now and I’m upper 30’s. A couple months ago she full out asked me if I wanted to have sex with her, says she has wanted me for some time. I said no at first but then a couple days later she showed up at my house and said she wanted to use my pool. Well one thing led to another and we had sex. We have been having sex regularly since but neither one of us has been exclusive. She called me to say she is pregnant and of course there is a possibility of it being mine.

What should I do? Should I let my friend know that I’m a possibility for being the dad now or wait until after the Paternity Test after birth?

My friends cousin?
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