Hands are hard to do, which you do well. But the grab (especially of soft, pliable objects) is a difficulty of its own. You hit it well, and you give the breast grab a realistic appearance. Made me want to grab a couple for comparison.
After multiple views of this tatt-girl scene over the years, I just now noticed that it looks like she lactates a l'il in frames 3 and 4 from her nipples being so adeptly manipulated by her tormentor/paramour!!