It is taking a while, sneak another peak

You have been stood like this for a minute or two now, trying not to think of what you have just seen. Your dick is still half hard with the though of Kate being in the shower there naked and you being able to watch her as she washes herself. You want to have another peak, but can't decide whether that makes you a bad friend or not.

Deciding that it can't hurt, she did leave the door open while she knew that you were coming over, you move closer to the door again.

As you look in you can see that Kate is still in the shower with her back towards you. This time you can also hear her softly moaning. "Is she masturbating? No you must be imagining that." You think to yourself. You look again and is clear now, Kate is masturbating in the shower; one hand between her legs and the other playing with her ample boobs. You quickly turn away again to head back downstairs, realising that your cock has properly woken up now.