I had a b*tard of a step father growing up, and at one point as an adult, cut off all communications with him to heal myself. During that stage, he up and died on me, leaving me no chance to ever heal my relationship to him. For about a year, a saw him walking in the parking lot, at McDonald's, in the stores, and other places. I knew he was dead, but the unresolved issues live on.
Stay on the planet. Give your kids a chance to get that closure to their troubled childhood, and meet you as adults. You deserve to know your adult children. They deserve to know you.