Lubricant problem?

After having sex for about 20minutes, it becomes painful because I think my girl loses her v. lubricant.. I did not yet ejacualate in yet it is becoming painful for both of us..
Plz suggest things about this..
tnxLubricant problem?
If she doesn't masturbate before, and or during this that may be part of the problem. Her vagina should providing the lubrication for intercourse. If she isn't ejaculating as well then the friction in drying the area. She may not be able to ejaculate as much. If it is painful then you should sustain from intercourse until you get a proper lubricant. If you don't you both will continue hurting during intercourse.
You should go to the local drug store and pick up KY lubrication or other brand in the same area as the condoms and feminine products. You could also go to a sex shop they also carry this product as well. If that isn't the option you want to try use a condom with a spermicidal or other type of lubricant. Do not just use any lubrication you can think of. Also do not use a lubricate that will irritate either partner, try a few brands and go with the one you both enjoy the best. Hope this helps, Good Luck!
use an artificial lubricant
Vagisil makes a great H20 based personal lubricant.
They sell lubricants for this anywhere...still problems she can speak with her doctor or OB.
Use a water based lubricant, Astroglide is great. No not use oil based ones, like Vaseline, this is not good for either of your healths. Hope this is helpful.