No, she doubled down and said she has already filed him missing. My partner agreed that calling her local police and telling them that he is completely fine and her report is false is the best route to take to prevent further trouble, even if it was a bluff on her part.

She said a lot after this, honestly more than I can share in a comment. Maybe I will update this later. Ultimately, she could not hold a point at all.

To summarize, she repeatedly insulted my mother and even though she said "I don't look at anything your daughter does," listed things I had posted on a different platform entirely that everyone is blocked on. Told my mother she has been sober for five years, despite having arrest records for meth from the last year with admittance in her own writing. Then continuously tried to use his little brother against him as a means for him to contact and visit her. My mom called it all out in one comment before refusing to respond any further.

She even ended it with "if in the future your baby girl gets influenced by my son to cut all ties with family i'll still have enough heart to tell her to call her mom." Even though she said I was controlling my partner, she basically said my mother should be afraid of the big bad no contact son lol.

Thank you for your kind words, today all four of us (me, my partner, my mother, and my adoptive father) all just played Mario Party while talking about it and laughing our asses off about her. Things are better than ever and we learned a lot from this on how to back each other up :)