This is a more simplistic version of the scam where they say "they are from another country & they will send you like 10K more" & then they want you to deposit it in your bank (because they can do it in their country) & then you are instructed to give them some of it back.... but you keep a handsome tip. something to that effect...
This granny is a seasoned scammer who knows what she is doing. I guarantee she is a leather-faced criminal who does this all the time on her phone in her trailer... while huffing on a fat cigarette in between soap-operas & bingo parlors.... she has no soul.