There have been a lot of times when our friends saw my wife naked - mostly while in a changing room together, changing into swimsuites at a lake or especially at the sauna. So rather normal situations.
But one more interesting event comes to my mind:
We rarely have friends at our place for a sleep over because most of them live pretty close and prefer to sleep at their own place. So we are not used to having other people at our home for the night.
My wife always only wears a t-shirt without panties for sleeping. Normally she gets out of bed in the morning, grabs something to drink from the kitchen, goes to the bathroom and then get's dressed.
A while ago two friends (a couple) stayed for a sleepover in summer. They got up early and I got out of bed too to help them make coffee. My wife wanted to sleep a little longer.
The three of us were sitting in the kitchen drinking coffee when my wife opened the kitchen door.
She was is her typical summer sleeping outfit, wearing a thin white croptop with her nipples clearly visible and no panties. Her landing strip and shaved pussy lips were perfectly lit by the morning sun shining through the window.
Apparently she completely forgot our friends were there. As she saw them sitting there she was shocked at first. But she played it cool and continued her morning routine walking to the fridge and grabbing something to drink. The guy tried to look away but the girl just stared at her pussy and ass when she walked past