Wifes cousin when she stayed over

My Wife's cousin was staying with us for a few days and our bedroom is right at the top of the stairs.

First thing in the morning, the wife goes downstairs to make coffee and throws the duvet basically half off the bed, a couple of minutes later, i heard someone coming up the stairs and thought i would surprise her by kicking off the rest of the duvet and laying there waiting for her 'half asleep'.

Must have stayed there for about 30 seconds when i realised she hadn't said anything so slowly opened my eyes to see her cousin standing at the door watching me. lets just say she got to see everything in my full glory, lol