Apple Users

Sadly forged phone calls (caller-id) and fake SMS text messages are common. I get
bogus texts and phone calls all the time.

They very likely don't have access to your (or your mother's) phones, but have copies
of your (one or both) contacts list and are trying to get you to respond before doing
something truly evil.

All too often messaging apps want to download your contacts-list to make it easy to
communicate with friends. But then they've got your data and it's another possible
source for the hackers to start doing things like this.

Of course it's a good idea to run a malware scan (using legit software, not scare-ware
crap someone has tried to sell you on the internet!), but odds are there's nothing on
your systems to remove.