I THINK her panic is more about it sinking in that she's losing 50% of her time with her kids.
She's not attracted to Defacto right now and so truly panicking over him isn't fully on her mind consciously yet. She knows she misses something and thinks maybe it's just his friendship when he pulls back like this but then her wayward mind recalls that Defacto is annoying (in her mind).
Consider this the Wayward Tango.
The internet is 90% complaining and entitlement and I hate it because I deserve better!