The dream (alternative ending)

The dream preyed on the Russian's mind, showing him a way to get ride of his wife. **Before this event happened, the Russian never thought about killing his spouse although even though he had a lover he wanted to marry.
"That dream definitely changed her behaviour, her paranoia got to the point that she had nightmares every night. One night she suddenly woke up looking very scared. She told me she had dreamed that she was buried in a grave while I was getting married with to another woman".
At this point of in the Russian's story I realized that he was sweating a lot. I think that only guilty people behaves this way.
Afterwards, he told me that one day her body was found at the bottom of the stairs by the doorman.It was thought to be an accident.
The way he was sweating and the brightness of his eyes caused me to doubt the Russian's story. For me, it was crystal clear that the Russian had murdered his wife.

**I would say "Before this", or "Before this event", or maybe "Before this happened", (although it is not really clear from the context what the "event" was). Saying "Before this event happened" seems somehow redundant.

Other than that, this is extremely well written. Bravo !