<human>: Edit: Decided to not go through with it, just going to wait until he's back from his trip. Thanks for all your advice. If anyone wants to continue commenting, be my guest. I'd not mind reading different views on the situation, though it is a non-issue now.

So I have a friend from work, and he has a wife. The three of us hang out somewhat frequently. I'm definitely closer with the husband, but I'd call the wife a good friend as well. 

A few weeks ago the three of us saw a movie together, and then we got on the topic of the new Insidious Chapter 2 movie. We talked about going together, but it was raised that the husband would be on a work related trip at the time (i.e. now). The wife said, "Well, EarlofJohn and I will just go see it then." The husband said, "Eh, whatever", but the tone with which he said it implied that he did not feel entirely comfortable with it. Now I am wanting to see the movie and do not have anyone to go with. I would see it alone, but scary movies like these tend to terrify me.

What I want advice on is whether I should bother asking him if I may get in touch with the wife about seeing the movie together. I absolutely am not considering just asking her directly without running it by him. I just want some advice, as I have neither been married nor been in a romantic relationship for more than a few months (they have been married a few years now), and consequently do entirely understand how I should proceed.

I just don't know exactly how to approach the subject with him, or if I even should bother. I don't want to overstep my boundaries as a friend.

Could you distill the essence of the text into 1-3 sentences?
<bot>: I want to take a friend's wife out to see a movie while he is away, don't know how to approach the subject with him or if I even should pursue seeing the movie with the wife.