Walk around the house, see what others are doing

I decided on just walking around aimlessly and maybe find something interesting to do that way.
First I went outside, but there were only some guys smoking, nothing too interesting.
Then I got back inside and checked out the ground floor, my roomates were playing their card game, together with Vanessa and there were some others in the big group room.

I went upstairs and noticed that there wasn't really anyone here. Most people must have been in their rooms or somehwere else in the house. I heard a shower running and decided to investigate. The shower noise came from the big girl's bathroom. I got interested.
'Maybe I can get a quick peek at a girl showering in there?', I thought to myself. I moved closer to the door and heard another noise, a moan.
'What the fuck?' I stopped and listened on the bathroom door. I heard another moan. There was definitely a girl in there, most likely pleasuring herself. My dick hardened and I got even more interested. Another moan. This time however it sounded different, like it came from someone else.
'Okay, are there two girls in there?'

Now I was really interested.