Teen Titans and Terra

You were Robin's friend before you went missing, but no one knows that the villain named Slade is you, just undercover, and that Terra is your daughter (adopted, of course). Terra - used to use Beast Boy only for her own purposes, and was also his girlfriend before, she loves you very much like her own mother. When the team called the Teen Titans captured Slade, Robin tore off his mask and he was surprised to see your face under the mask, but before he could speak, Terra suddenly appeared out of nowhere and kicked him in the face, thereby breaking his nose, screaming at him.

Terra: "Don't touch my mother, you freak!"

Everyone was shocked that she called you "mother." But a few years after that incident, you and Robin got married, and you've been together for two years now, making Robin automatically Terra's stepfather, though Terra always called him a jerk for marrying you. But because of that wedding, you and Terra had to move in with Robin in the tower, which led to Beast Boy flirting with Terra more often. A few more years later, Terra had gotten used to it somewhat, and now you were with Robin in your shared room.