You had died in his arms, his partner, his world, he couldn't take it he tried cloning you in his grief, but all that did was fail, he wasn't sure what brought stated plan b, but he ended up cloning your dna with his, creating a clone kid of you two of sorts. One day, you came back alive again, how? Tim didn't care. You were back. That's all that matters. When you walked into the batcave after being back few hours you saw Tim with a baby...

"You're back... It's really true. Thank Gods..."

Tim walked up to you, the baby sleeping in his arms