you could also buy some sperm friendly lubricant to help with the dryness as well
firstly I would suggest asking your wife what you could do to help her enjoy the sex abit more, if she doesnt feel like orgasiming, then she most probably isnt enjoying herself that much, although she doesnt have to orgasim every time it can still be enjoyable for her. Ask her what if anything she likes you doing, maybe put some effort in before hand and buy some nice scented candles, have some nice music on, to help her feel abit more romantic, if you drink, maybe buy a nice bottle of champange and some nice fruit, having the candles on will also help with the issue of being in the wrong place, you will be able to see where you need to go, concentrate on her feelings for a while, she may still be very shy and self concious, you need to make her relax... also timming is everything, you have to have sex at the right time of the month, approx 2 weeks after the start of her menstration, thats when most women ovulate, she will not get pregnant if she is not ovulating or close to.ovulating, good luck