What she needs, deserves, or can get -- all very different when D'ing. It sounds like your W is out to see what she "can get" out of you.
My impression is the pants comment was to tell you she knows you are interacting with other women now, and to see what kind of information and reaction you would have in response.
Me45 W35 M6 T8 D16 SD11 D0 Dec 07: Bomb July 08: Busted! Thread