<human>: A year ago, a year into our relationship, Laura cheated on me with George at a party. They had sex again twice over the following week. Laura told me about it the week after that.

Since then its been a rocky road. We've never split up. Now shes been diagnosed as being pregnant. 

On the advice of close friends ive informed her ill be wanting a paternity test done. As the title suggests, she is not happy about this going as far as saying that my behavior is what will make her cheat again. Am I wrong for being paranoid?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My gf of 2 years cheated on me a year ago now shes pregnant but I dont feel confident that she hasnt been impregnated by someone else. This may ruin our relationship. Should I hold my ground?