"Last night, she asked me to stop coming on here out of respect for her."
In order to respect or disrespect someone, you have to do something that directly affects them. Coming to this board does not directly affect her. This kind of reasoning that by coming here you are disrespecting her is a control tactic via the means of manipulation. I have been through enough abusive relationships in my life time to say that without a single doubt. Any time one of my abusers wanted me to do something that went against my personal wishes, a lot of times they would pull out the "respect" card. Don't fall for it.
Additionally, you do NOT have to tell your wife about this board if doing so will illicit this kind of manipulation on her part. Trust is something that is earned, it's not a right, even when you are married. If she has not shown herself worthy of your trust in this area via attempts to control what information you access through manipulative means, then don't trust her with this information.
If your wife expects you to respect her beliefs, she needs to do the same with you, bottom line. That obviously is not happening. She expects you to respect her beliefs and expects to exert control over your beliefs as well. There is a name for this kind of behavior - it's called "spiritual abuse"! And it is considered to be right up there with other forms of abuse such as verbal, emotional, mental, and even physical! ANY attempts to control your behavior rather than allow you to make your own choices is considered abuse.
As to why your wife is so serious and pushy about this - you can blame the JWs. I know it sounds too easy but it's the truth. The JWs first of all make it clear that any one married to a non-believer needs to push for them to get involved as well. They also tend to make it seem like your marriage is doomed to fail if you're not married to another JW. Now let's add on the shame someone feels when married to a non-believer because of all the talking that goes on behind their back about it. And then let's not forget the fear that you are becoming an apostate, someone that she will not be able to have any contact with whatsoever...
She's scared, and with so many reasons to be afraid being thrown at her, it's really no wonder why she's trying to take over control of the situation by taking over control of you. Humans need the ability to feel in control of their lives, and the WBTS takes that control away from them and then when they feel out of control the WBTS points the finger at Satan and "the world" (which includes YOU). So of course the next step is to try to take control... which they are led to believe means they need to get rid of Satan and all his nasty influence. She thinks you're being misled by Satan and that through him influencing you he's going to start influencing her, so she's trying to nip the "problem" in the bud by stopping him from influencing you so she doesn't have to cut you off as a person.
Wow I hope that makes some sense... JWs can be so confusing, even for those of us that have grown up with them.
Anyways, I know I'm a little late commenting on this topic, but I just joined yesterday and I really felt the need to speak out about this one. Boy have I been down that "respect" road too many times before... it's a doozy.