Last year, when I had a bad case of EAS, the plan was that the WG and I went for a meal in town before going to her working flat for an Overnight.
Anyway, when we came out of the restaurant and got a taxi, she decided that because she'd made arrangements for her teenager to have a sleepover at a friend's house, it'd be okay for us to go back to her home for the night. I wasn't particularly bothered in which bed I had her so it didn't make any difference to me where we went.
Until about 5 minutes after she'd let us into the house, while we were enjoying a nightcap before going upstairs for the night. The front door opened and the two teenagers came in!
They'd decided that they'd have less trouble from adults [re booze, cigs, etc] if their sleepover was in a house without any parental supervision so the WG's son had suggested going back to his home. It's a bog-standard 1930's terraced house in which the night was spent with the WG & me in her bedroom and her son and his mate on bunk beds in the lad's room on the other side of the flight of stairs.
I don't know which of her son or me felt more uncomfortable at the situation; but it wasn't half a passion-killer!
From something she said to me later, I discovered that she'd induced E.A.S. in another of her clients but whether he had an experience like mine, I'll never know.