Alright. Let'see... My mom's the Scarlet Witch, who in my universe happens to be your daughter. When she was with the Vision, another Avenger, she used her reality-warping powers to wish twins into existence (that'd be me and my brother, who's not here, thankfully because he'd hate all these family reunions). Anyway, it turned out that her magic came from a demon known as Mephisto and we were taken back to live in some sort of spiritual Hell.
My mom cast another spell to forget that we'd ever existed, except it only sort of worked, Eventually, she remembered us, had a nervous breakdown, wished us back into existence -- only to have us disappear again because reasons.
At some point, we ended up reincarnated into our present state, were reunited with our mother, and -- fixed some things.