I think, if you have contact with your son, inform him that they are trying to reach him, and is it ok to give them his contact info, or tell them that he is in jail.
My xdil had manipulated our two grands that we adopted about 15 years ago. Last week was the worst! She told both girls (19 and 21) that her dad, their grandpa, was in hospice, with a feeding tube, that was to be removed soon. Then he would die. She offered to buy them tickets to visit before he passed. It is 1800 miles from here. They have spent I week with their grandparents 5 years ago. We took them.
Turns out, he is in a rehab hospital, he had a picture line for a blood infection, he would be done with the IV medications in a week, then he was going home. No hospice, no feeding tube, no imminent death.
She said she bought flight tickets. Girls found out they were one way tickets! She wanted them to come and get jobs there.
Both girls turned her down. They haven't seen her for 8 years. I am glad I stayed out of it and they decided on their own.
Who the hell does that to their kids! Ksm
