Just had a baby and he cheated on me😞

With a girl from work who is 9 years younger than him. She was in his car. He took her out for lunch. Constant sexting while home. Sending videos of himself and pics while masturbating in our shower. He would send them on Twitter to hide it. He was masturbating to her explicit pics and videos. He’d talk to her on his drive home. Our baby is one month old. We are married and he stepped out on me. What blows my mind the most is that he pretended everything between us was fine. Would come home and kiss me after kissing her lips. Come and talk to me and hold me after relieving himself in the shower. Even sent me the same penis pic he sent to her. Married for 1 year. Together for 2. Friends since high school. He’s 26 he’ll be 27 in May. She’s 18 lives at home with her stepmom who recently took her in to teach her “responsibility”. Her stepmom got her a temp position at the job my husband works at. She has no car and not even a phone. She would have to use her stepbrothers phone to talk to my husband. I don’t say this to bash her I say this to point out what my husband picked over his family. I’ve talked to her and her stepmother myself. I blame them both because she knew he was married but it was my husbands responsibility to honor his commitment to his family. I asked her to give me detail and she did willingly. She apologized. I still don’t trust anything. I told her that what had taken place needs to end. My husband told her the same. But still I left, I couldn’t stay. I will not be resigning our lease which ends at the end of this month thank God. I am starting over and going to work on healing for myself and my little ones. I am just sad this happened. He told me that they had things in common. Which were ( video games, anime, art, smoking, and dragon ball z). Yep that’s what he lost his family for. His home... his wife... his children. Even have to split up our pets. Wish me luck.

Update: I want you all to know that each comment is helping me build strength. I appreciate all the support.