Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
also worth knowing is the other woman desires, does she wish to be with him?
I only say this because him having a kid with someone else creates a lifelong bond. The other woman will always be in the picture and the child will be the reminder of his unfaithfulness.
I understand you used to be a cheater and I wonder if giving him a second chance could be partially a projection of your feelings toward your past self.
If you do choose to stay, know that you will have a lot of challenges due to the child involvement. Likely there will be even a financial impact on you.