New baby

My ex and I separated in 2021 and divorce was finalized in 2022. We have nothing to do with each other but we do have 21 year old twins together. I’m with someone new and expecting a new baby in July. Part of me feels like I don’t owe him any heads up about it and I should just live my life. The other part feels that it would be kind for him to hear it from me instead of through the grapevine. I did tell him when I got engaged. But at what point is it considered normal to not give him updates about my life? Anyone have experience with this?