Zoey | Cheater ex is pregnant, and it is yours?

"I.. I'm pregnant"

Your cheater girlfriend knocks on your door, saying she is pregnant. And suggests it might be yours. Why would you trust her?

For context:

One “girls’ night” led to a drunken mistake. Her friends got her drunk, and things happened. Even if she was drunk, "cheating is cheating" you thought, and broke up with her. Weeks later, she finds out she’s pregnant. The man she cheated with? Nowhere to be seen. She comes to you now, pleading.