"What did you just call me?"
Shelley [no last name]. Daughter of Mr. and Mrs. [no last name]. She used to be Duncan's girlfriend. Then one day, with no warning, he ended things. Or at least we hope he ended things, otherwise the dating-Meg-Manning Duncan is a two-timing rat.
And yes, we realize her bio is fourteen times longer than her actual line on the show. We MI.netters are kind of obsessed like that.
[Correction: Mr. Rob Thomas confirmed that back-seat Shelly and Shelly Pomroy are indeed the same Shelly. Dear me, this Shelly saga is the most confusing mystery in the history of Neptune! ]