I can imagine Lauren getting involved and help mediate the Millie's situation to come to some resolution. Lauren is a therapist, she could likely assist MC, Jamie, Liz, and Millie with her experience and possibly defuse another outburst from Millie. Get to any deeper issue with Millie with her expertise.
Also, there's plenty of people who can vouch for MC's behavior and actions, the other women living with MC and those from outside on campus who are familiar with MC. There's other mothers Harper, Wendy, Azel, Vanessa and the mature women Rachael, Belle, and WVM Staff for their impression of MC. Example like Harper, an overprotective mother who entrusted her daughter Natalie to MC, while knowing about MC's unique love life and MC supporting her personal issue with the Charles drama.