What it would tell me is that you as the DM are not going to treat me like a full fledge member of the group. That you are uncomfortable having a woman playing and that you want to treat me as special or different than everyone else at the table.
And, you would be wrong about this, too.
Once I was sure the wife knew what she was getting into, I didn't let her presence alter my game one iota.
It's because I knew I wouldn't allow a female presence to alter my game that I made sure she knew what the game would be like.
My game is akin to the Spartacus TV series. All kinds of bloody, heinous crap happens. Some people don't want to play that way--they want Lord of the Rings. And, that's fine. It's just not my game.
If she was single would you have talked directly to her?
Yes.
if the answer is yes then why would her being married make you treat her differently?
Respect. Respect for the husband and respect for her.
At the table I expect to be treated the same way everyone else is.
If I allow you in my game, you are, in deed, treated like everyone else.
By leaving out the wife, you actually trivialized her, and placed the burden of her comfort level with her husband. Not really fair to either of them. What if he had misjudged?
After the husband had spoken with her (and, from her demeanor, I think she really appreciated the way I handled it...I am a gentleman, after all), I had a few words with her in front of her husband. "He mentioned this? He mentioned that?"
She shook her head to the positive. But, by that time, it was the third time she had heard it: first from the player that brought her in; second, by her husband; and third, by those few words just before the game started with me.
I did notice that there was an uncomfortable air about the room when that game got started, and I recognized the cause, right off the bat. It was the woman in the room.
Guy will sit around the room and shoot the crap to all levels of vulgarity, but throw a woman in the room, and these vulgar apes become decent human beings.
They didn't want to play the game like that. For example, one of the players in that game liked to visit whores at the various space ports (we were playing Traveller). I noticed, that evening, that he didn't do his usual whoring bit.
It's because the woman was in the room.
After the first game session, I made a speach before we started about playing the game as we always have. Then, during the sessions, I got a bit ultra vulgar with my descriptions on purpose, to be the first to play the game like we used to.
It didn't take long before everyone slipped back into their old molds, and we all went on to enjoy a very good campaign.