First of all....WELCOME.

Let me start by saying, "been there/done that!". And no, MY problem is not 100% gone. But it is greatly reduced.

First step is to find out WHICH cat! Not an easy thing to do.

Second step is to THINK..when did it start and what could have triggered it?
some ideas-
-new litter?
-move a litter box?
-new cat introduced?
-rearrange furniture?
-dominance issues between cats?
-stray cats outside your home?
-change of food?
-Did you go away on vacation?
oh my, the list could go on and on.

Third step, clean the area thoroghly with an enzyme cleaner to remove the scent. (and do not feel strange covering your chair. My living room set is covered with plastic and then draped with "easy to wash" sheets. )

Now for the questions.
-Did you use the feliway plug in or srpay bottle? Even though I personally do not believe feliway is 100% effective, others have had success. But it needs to be the spray bottle (for this problem) and it needs to be done consistantly!
-Was a urinalysis part of the cats' vet check up? For spraying, urinary tract problems are the most common physical cause. But not the ONLY cause.
-Could your husband (since it is his chair) offended a cat in any way, lately? A stern scolding? Giving less attention than usual? Or more attention to another cat?

Well, the list can go on.................

What I personally did.
-first, separate the offending cat. This is to a large cage or small room. the idea is to "retrain" the cat to use the litter box.
-second, is medication. I have 2 "pee-ers" on amitriptylin twice a day. It is like a kitty prozac. reduces their stress and their need to spray mark. (I also have a 3rd cat on this medication once a day because he is also high strung)

But like I said, it is not 100% stopped. I foster cats for a rescue group. And even though they live seperately from my cats, whenever there is contact I tend to get spraying again. So I continue to keep the furniture covered and just clean a lot.

I too have thought of ALL the ways to get myself out of the situation. And I cried over the thought of losing any of them. I made a committment and I just have too TRY to live with it (no matter how frustrated and mad I get at times). You will find others who are the same as me here on this board.

Hang in their.............those babies NEED you.