Email after two years of no contact

We’ve been no contact for two years now. He recently received an email asking “do we have a grandchild?”. My husband just deleted it and plans to continue NC. I wonder if I’m being paranoid/freaking out because I feel like it’s a really bad sign for them to email asking that. We also recently moved so my JNILs no longer know where we live……they also do not have our phone numbers.

Edit: we do have a baby now…..