~A DIFFERNT PERSPECTIVE FOLLOWS~
This book helped me a lot:
http://www.amazon.com/Tickle-His-Pickle-Hands-Pleasing/dp/0970661126
I am just offering a different perspective than most of the people here so if you are not interested just quit reading now.
My sex life used to suck big time. My DH would look at porn and I'd get mad, blah, blah...typical married stuff.
Then one day we had a heart to heart and he basically told me he is a horny bastard and we have to spice stuff up or else he would have to look elsewhere. In my mind this meant that our marriage would be over because I wouldn't have kids with a man who is hooking up with other chicks, ect.
Anyway, he started telling me what he thought is hot. Me dressing up for him, clothes, lingerie, make-up, stripper shoes, watching porn *together* helped me pick up a lot of tips actually. We don't do this anymore but it's not off limits, we just abandoned it out of already being turned on enough without it.
Sounds weird but almost EVERY time we get ready to DTD it is a planned event. Sometimes it starts with a cup of coffee because I want to have energy. I'll get ready, do makeup, sometimes dress up, sometimes not. All of this is part of gettin gme in the mood I guess. At first I just did it at his request then the anticipation of it all started to really turn me on. It built confidence that I was hot and I knew wtf I was doing in bed because I felt hot. Gosh, that is kinda embarrasing. But oh well, just trying to help out, LOL!
Does it bug her to have the lights on? Will she be on top? Will she go with you to Hustler Hollywood (or adult place) to buy her panties? Does she like to dress up for you? Get clean shaven, toys ect? Only since I have done all of these things are we happy with our sex. Otherwise we would be divorced now. Instead we have been working this shit out for 14 years.
Anyway, work on building her confidence. When we first hooked up I wouldn't even let him look at me without my clothes on hardly, ect. Now everytime we DTD he says he can't believe that he gets to be with me becuase I'm so awesome in bed, ect. Totally not bragging or thinking I'm cool here. Just sharing my experience.
Oh, also, get some coconut oil. It gets the sheets oily but it is so worth it.