Her husband made it very clear to the men that she was drugged and wasn't aware of what was going on. They met on a website for men into raping drugged women, so there's no doubt they were aware she wasn't consenting.
As you say, he had stipulations, they had to park away from the house, not smoke or wear cologne, had to leave if she moves and couldn't leave anything behind.
They are all sick monsters and I'm assuming they have families of their own and wives. Many had respectable jobs.