There are four girls with endings to their stories, this guide will tell you how achieve them and how to get as far as you currently can with the other girls in the house. This guide will walk you through each of the girl endings step-by-step. You can go with any character you like. There are two paths you can go down with Madison with different endings, one ends with you being able to strip and pose her, the other ends with clothed BJs.
Follow this step by step walkthrough to hook up with Katherine in House Party. The most important thing to keep in mind is to save frequently. While the route is fairly short, one wrong dialogue option can ruin your run. Right from the start, head upstairs and take the first door on the right to the Master Bedroom.