Can't IMAGINE her being an escort - she's squeamish about intimacy and high mileage as it is.
Best bet is just to call/e-mail Kayla or Paul and ask. My best guess would be that her "other" career just began to take more time. A lot of the smarter really pretty MPA's work to pay the bills while working on the long-term plan which includes either school or a "real" job (paralegal, etc.).
Or maybe someone really rich married her and took her up to a Muskoka love retreat where she gets fucked four times a day and serves lunch naked with a big dreamy smile on her face.
Mmmmm..... peanut butter.