This family feud is really beginning to show! Just hours after it was revealed that Elon Musk’s 18-year-old daughter has filed legal documents to change her gender identity to female and to drop his last name from hers for good (now wishing to be called Vivian Jenna Wilson), his ex-wife is supporting her decision!

On Twitter Monday, Justine Musk, who was married to the Tesla founder from 2000 to 2008 and shares five kids with him, reflected on a recent conversation she’s had with one of her 18-year-olds.

Vivian has a twin brother, Griffin, but given the topic of the chat and the timing, it sure sounds like this was a reference to her daughter. Related: Nick Cannon’s Baby Mommas Hilariously TROLLED Him For Father’s Day! Justine wrote: Aw!