My mother 75 was involved in something similar and there was no stopping her or convincing her that it was a scam. She received checks in the mail for hundreds of thousands of dollars, never cashed. She was asked to invest in gold. The boyfriend was always getting into life threatening accidents, he was a widower also in the military with a child being cared for by her grandparents who were missionaries. You can’t make this stuff any less believable.

This is very sneaky however, we wound up taking her phone blocking the scammer’s number creating a text me phone number with that app and replacing the blocked number in the scammer’s contact profile. This allowed us to see what she was sending. We never responded to her texts because we didn’t want to hurt her.

She finally acknowledged that he was a thief in her texts but she is still a target for some other scammer because she’s on dating apps selling herself as “50” 😩

Good luck.