"how he dares to run away from me like a COWard" though mary with anger, idly rubbing her growing udder, "I think I'm gonna have fun with Rob and Amanda. I can slip some of the vials in their food tonight" with a devilish smile on her face, she starts daydreaming on turning them on cat and dog, elephant and mouse or even mixing various vials. The udder starts swelling at a slow rate, well, whatever was her masterplan, it was going to have to wait an opportunity the night.
Then her udder keeps swelling. "I better get this thing off me", she said as she waddled back to the house.