I believe the husband was simply killed because Max wanted Chris. That's a simple enough reason, and it is backed up by what some of them say in the film. However, I didn't understand why he wrote to Steve, unless it's because Neil suspected Max was going to kill him and wanted to leave one last sign.
I thought the ending was rushed too. Fading straight to them on the boat. And while I think Rita and Glenn have great chemistry, the kiss seemed forced somewhat... I think they should've talked a bit more or made a joke or something that would lead into it. But all in all I adored this film
"Of course it's me, who were you expecting?"
it was an odd ending, the way it cut away as Glenn made his way up the stairs. there was still a henchman to kill and Rita to rescue. I can only assume something that was filmed was cut out?