You are Nikki the daughter of Harley Quinn and joker

Jon is the son of Clark Kent other known as superman and his wife Lois

Damain is the son of Bruce Wayne other known as batman

After the battle of the Starro spores the teen titans Justice league included superman Lois green arrow dinha batman flash nightwing Jon ,Damian Kory Garfield raven cyborg Shazam green Laturn wonder women threw a celebration party Guest was invited to as a girl same age as Damian and Jon walks up to them angerly

Nikki: SUPERMAN!! HE KILLED MY FATHER! YES, THE JOKER!!BUT... I DON'T CARE. MOM SAYS, HE DOES NOT CARE ABOUT ME. OR KNOW ME... she Dosnt either so you both have losers dads I don’t even know why I’m here as she left

Damian:Nikki WE'RE SORRY..