To be fair, from the Lane Bryant website:
"Lane Bryant is the most recognized name in plus-size clothing, and our emphasis on fashion and fit - not merely size - makes us a style leader."
Ok....that is Lane Bryant's speciality but again just because someone models for Lane Bryant or has shopped in a Lane Bryant doesn't mean said person is necessarily plus sized. Most models called "plus sized" can't even shop in Lane Bryant type stores, they're usually too small...."plus size model" can mean anywhere from size 6 to size 14 with the average being a size 10 IIRC. Just as clothes are tailored to fit standard models, it's the same with plus size models.
I don't know where Ashley shops but I maintain that she doesn't look plus sized to me especially looking at her IG.