She hasn't actually shown plates with WLS-appropriate portions since the very, very beginning of her #105poundsdown adventure. Like, the first month or two maybe we'd see her dainty plate if a meal was included in the vlog but then that stopped. For a long time Atha went to great lengths to either not film her plate or (try to) edit it out of vlogs. It's been over a year now at least since he's stopped bothering.
There is zero chance she's sharing with Abbie. We've seen them more than enough times at various restaurants to know Abbie gets her own plate of food and that she eats it all. There's literal video documentation of it and I don't know who she thinks she's fooling.
Also - Miss
#105poundsdown #70poundsdown #50poundsup has no problem posting her appetizer and dinner plates and cocktail glasses to Instagram from their frequent dAtE nIgHtS when Abbie isn't around to "share" it with her.
If Priscilla is so comfortable with her body and happy with herself she shouldn't feel the need to lie about her meals.