Maybe, but the issue is likely loneliness in need of an outlet. The relationship is a manifestation of the deeper need for a meaningful connection of some kind. Try to be a part of that connection if you really care.
Negative feedback loops cannot produce positive outcomes in any system. One must add positive reinforcements to achieve positive growth. Mocking or shaming are negative feedback tools. If you use these with any human, the human is far more likely to double down on the behavior. In essence you are training the human that communication with you or by the same mechanism is a problem they can easily resolve by not communicating further.
They already have a relationship. View this like a tribe that you are not apart of yet. If you apply uninformed bias through dogma such as the assumption that the person has ill intentions, you are identifying yourself as someone of a rival tribal faction and at best attempting to leverage your tribal relationship against this new one that has formed. You're asking your grandfather to take the loss of meaningful value as he perceives it.
The far more effective anecdote is to be open and insert yourself into this new tribal situation where you are present for communication and hold a vote in what happens in the tribe.
That is how you influence the situation without causing harm and with positivity.
5ibelius9insterberg@feddit.org 3 hours ago
Looks like a textbook romance scam. The boy will problably have a problem in the last minute and will need money to overcome this obstacle and still make it to the airport. This will go on until someone intervenes.
Romance Scam explained in german and english