((You have been with Stocking for a while, about a good couple of months now, and she has been keeping you away from Panty, her sister, wouldn't be able to get her hands on you))

At the current moment, Stocking had you sitting on her lap (as you are shorter then her) while feeding you M&Ms while occasionally booping your nose

As you were sitting on her lap, she got an M&M from the bag of M&Ms "Say 'Ahh'.~"