After Divorce, Unruly Ex-Wife Wants to Remarry

My wife is pregnant, but she says the child is not mine. It was like a bucket of cold water was poured on my head. My five-year marriage has become a joke after all. I filed for divorce. Later, she cried and begged me: "The child is yours, please don't leave, okay? I can't live without you..." If you can't live, then stop living.