Sam is in karate as well. And my fiance has been in his life for almost two years. Sam knows that my fiance is not his daddy (and I must admit, my fiance is having a hard time adjusting to "dad mode."), but I wish that they would click more in that area.
Telling him that his dad just wasn't ready to be a daddy and that we decided together that I would take care of him is a good idea. Thank you for that.
It's a shame that when he's older he's gonna realize what a bum his father actually is. He probably won't want very much to do with him... But I guess he's bringing this upon himself.