<He would have left, then, or spilled a cocktail into her décolleté!>
I don't think you can use the simple past, if one of the speakers has a décolleté.
MrP
Shall we say "a perfect past"?
They MAY have fallen out!
Then it would be an "imperfect past"
One of the speakers has a décolleté? And they may have fallen out?
(Where was this hotel, again?)
"His brow was sweating as he looked across the room at her especially now that they had fallen out and he longed to know her. He found himself rising, but then to his dismay saw that his gerund was dangling, so he swiftly sat down again on his present participle."
I hope he managed to fix his gerund?