My (M25) wife (F24) cheated on me and is now pregnant

Hello.<br><br>My wife and I got married just after our 23rd birthdays, we were together for 3 years before that. I was always more introverted and she is extremely extroverted so she has a massive group of friends and always goes out. I was more comfortable staying home.<br><br>During our marriage she has consistently told me how I need to be more outgoing and more social and that she feels lonely when I just stay home with my dog and that she needs to go out to have fun.<br><br>I've tried going out with her before but I never enjoyed it and she would end up finding ways to complain about it.<br><br>About 2 months ago we had an argument and she went out with her friends. She came back when I was sleeping but the next morning I woke up to her crying. She told me that she did something that she's ashamed of and she wished she could take it back.<br><br>She told me she cheated on me with a guy and she went to a hotel with him. She said it happened in the heat of the moment and she was drunk. She begged me to forgive her but I told her that I don't know if I can.<br><br>It had hurt me so much and she was someone who was always trying to change me for not being outgoing enough and one day she goes out and cheats on me.<br><br>A few days later she told me she was pregnant.<br><br>We lost our baby last year so we both felt like the miscarriage was karmic punishment for her infidelity. I told her I wanted a paternity test once the baby was born and she told me not to say that again and that she's upset how I'm acting.<br><br>She started going out even more.<br><br>I told her that the best course of action for her and the baby AND for me is to get a divorce but she refused.<br><br>I don't want to be stuck raising a child I have doubts over and I don't want to be in a marriage with someone who cheats on me.<br><br>What should I do in this situation?<br><br>&#x200B;<br><br>Edit: I want to say thank you to everyone who commented thus far. I'm going to tell her about the divorce tomorrow and if she still says no I'll just consult a lawyer anyway.