“Husband” (currently going through a divorce) got the girl he cheated on on me with pregnant

We experienced secondary unexplained infertility and miscarriages. I found out the news today from someone that knows someone that knows the girl lol I have been going through this divorce for the last year and a half, he’s holding It up. It’s draining and toxic. When I heard the news I felt nothing. I’m not angry, sad or jealous. Nothing. My only thought was that I hope this makes him want to move the process forward. I have taken the last year to focus on myself and really work on myself. I’ve seen the true colors of the person that I married and I’m grateful to be on the other side of It. My question, is It normal to feel numb about things that would have once destroyed you? I just want to fully move on with my life. Be free and not have to deal with my ex anymore. Thank you in advance!