More markers!

Deciding you could taking things a little bit further, you uncap a fourth one and push it in the same way as the one before it. With this marker, you can tell that you're stretching out Allison's vagina in a way it's never been before, and you're hearing the effects of it from through your adjoining wall.

You grin to yourself and decide that you can probably add one more. You uncap the fifth marker and try to push it in-between all four of the ones already in place. This time, it's actually rather difficult, almost as if a rubber band were stretched completely tight around all four markers, to the point of nearly breaking as you shove the last one in. Regardless, you manage to push it all the way inside, more screams being elicited next door.