[Albion Wilde]

There was no reason for her to attend such a dinner other than she fancies herself as part of the entourage of the Ruling Class elite.

Don't be ridiculous Most White House evening social invitations are for the officials and a "plus one"—a spouse, a date or in some cases a friend or parent, at the official's choosing. She is no doubt proud of her son and simply enjoyed seeing his extraordinary work environment. I highly doubt she has much to say about national policy. She was a homemaker and her husband was a fire chief.

[Hostage]

Ok, but she knew her son would be investigating the Bidens.

Attendance is not mandatory.