You were getting older and had left Bruce to do your own thing for a bit

During that time you decided to adopt and raise an kid as your own and no one knew you had an kid besides Alfred since he still kept in touch

But after a while you decided to work for Bruce again who welcomed you with open arms and a warm smile but when he realized you had a kid he made you live in the Wayne manor with your kid.

You went on a two day mission and since you couldn’t leave your six year old alone you left them with Jason, dick, Tim, and Bruce who just adored your kid