All that is possible but unlikely right up to one moment. That is the moment police open the door. At that point, the safest action would be obvious to a sober man: Yell "help," let go of the hammer and run to the police while dropping the "water" and protecting your head with your hands.
For him to act as he did, he had to be trying to contain an embarassing situation, or be drunk off his ass.
The two men did not have to in a "gay tryst" for it to be an embarassing domestic disturbance. They could have been playing dominos, trading collectable coins, watching netflix, or any other activity that could lead to an argument, when an altercation broke out. Plastered Pelosi already embarassed his wife, so far as a Democrat is capable of being embarassed by a person who doesn't mind running over children. His strategy would have been a political one.
Another scenario, far far more likely than the plot to kidnap Nancy is that Depape threatened to tell Nancy a secret and demanded money in exchange. That would make sense in light of the purported 911 recording.
The official narrative does not make sense. No one has to pin down the exact scenario that happened to understand that the offical narrative cannot logically be true.
Suppose a kid realizes that the santa story is false, because there is no way all of Santa's legendary feats are possible. The kid gets that a fat old man flying all around the world, pulled by flying reindeer and giving every kid in every family presents in one night is not possible.
If challenged to provide an alternative theory, that kid does not have to explain where all the presents come from. If he guesses that it is local neighborhood committees that provide them, under guidance from Santa, that would be a good guess for a kid, even though wrong. He won't be able to prove it, but he doesn't have to.
He does not have to prove that exact scenario, or any other, to know that the magical version of Santa is not authentic.