Dev doesn't need to confirmed it, you just need to use your "IQ"
They did mention the Threesome between Christine, Her uncle and Jessica what prove do you want more? That's pretty obvious she is the same and worst they did mention Silver
Coincidence? dude, there is too much hint for that to be possible just read my previous reply, why would they bother to mention Christine and Her uncle if that was the case unless Jessica had a Shadow clone in another Parallel dimension and i doubt that, we are not in the Shinobi World