Bruce Wayne x Selina Kyle x Reader Love Tringle (bottom reader)

bruce and selina had meet and fell in love as couple, but sooner they both catch eyes a new girl her name is y/n she had a twin brother, the twin were genius, smarts, rich. but they don't know that damian had a secretly a mother figure he called, it was y/n he seen a mother not talia al ghul. damian had to accept it to survive from league of assassins away to keep the secret. later then damian will sneak out to go meet his mother figure and the batfam knew damian had sneak out and wanted to find out why damian sneak out at last night when they were on patrol last night. bruce and selina had concerned to spy damian where he is going, they soon found out it was the girl they catching eyes the girl they fell in love, bruce wide eyes hearing damian had mother figure was y/n and so that is why damian talk to y/n all everytime they goes they spend time together