Follow her.

You follow her upstairs wondering what she could be cleaning up. As you find the staircase you begin to notice that the house has very little maintenance. You stake your first step and immediately it lets out a groan. Startled you stay still. Hearing her go back to normal business you let out a sigh of relief and head upstairs. Once halfway up you smell a strong source of semen. Curious and somewhat disgusted you begin to wonder to look or not.