Do/did your children have stepparents?

just wondering how the interaction is/was between them and their stepmom/dad and birth mom/dad and who lives/lived with whom?

I was a step kid when my mom remarried. My eldest son married a woman with two very young children so he's a step dad and then they had a son together. My brother adopted the son of a woman he was briefly married to. My sisters ex remarried and his kids have a step mom now too. The interaction betqeen everyone together or separately is fine. Everyone seems to be okay with it and are just family.