Accidentally seeing my wi(f)e’s friend in the bathroo(m)

So my wife’s friend Shelley was staying with us for a few nights while she was in town. Shelley is heaps of fun – bright, energetic (almost too much sometimes) and funny. She a larger girl without being fat, Not ugly but I’ve never really been that attracted to her. She does have a very sensual nature about her though and is a massive flirt. She’ll often cuddle up to us on the couch, run her fingers through my hair and on occasion has given me a kiss hello or goodbye that is borderline inappropriate. To the point where my wife has gotten a little annoyed but I’ve always waved it away and told her that its just in her nature to be flirty and theres nothing more to it. At least, thats what I thought until she stayed with us.

On the second to last morning of her stay with us I slept in and was running super late for work. My wife was in the shower so I quickly stripped off to join her forgetting that it was ‘that time of the month’ and she doesn’t like a joint shower then. In a mixed of tiredness and late-panic I quickly threw a towel around myself and headed to our other bathroom. I flung open the door and was unexpectedly greeted with the sight of Shelley, stark naked, standing at the basin facing the mirror.