Since my post I've sent a few gifts for the baby and the car was picked up by a tow truck while we were sleeping. I've still heard nothing from any of them.
He quit his job and is now working with her family just as I predicted. I think he's being manipulated and isolated by her. His last connection to our family was his biweekly fishing with his brother and that has stopped too.
He is now only involved with her and her circle of people who support her narrative.
I rented the apartment to his friend that has been close to our family since grade school. Through his social media he showed me posts from her themed with only wanting to be with her baby and husband 24/7 and how much she's disappointed in the friends that encourage them to hang out.
It's obvious what she's doing is coercive control.
I'm going to take your advice and focus on me and my family that is around me.
I'll continue to send cards and gifts.
Thank you for your time and response.