Originally Posted by kvz5
I don't think Bruce would wait that long to let Alfred know that he's alive but Selina already has the pearls which leads to me to think that it might've been a while since they're at that stage in their relationship already where Bruce gave her the pearls as a sign of something longterm.
Yeah, the necklace is symbolic that this is Bruce's girl. Not a fling but something substantial. It's over to the viewer really in regards to the timeline afterwards.
Imagine if Selina re-stole the necklace and Bruce didn't give back it to her. He's just like, you want it really bad, I can't find any better hiding spots and yeah, it does look good on you.