The only way I reach orgasm during sex is if I pleasure myself at the same time... luckily my boyfriend loves it that way though
BTW, some women need clitoral stimulation as well as penetration in order to orgasm during sex. Sorry if this offends anyone...BUT toys can be used to help, if the two of you are comfortable with the idea. But like I said, don't feel bad about it...
Don't feel bad about it, a lot of women can not orgasm during sex. But I agree with cherie762, ask her what she likes...
Practice makes perfect. also come right out and ask her what she likes, she may be to shy to tell you.