Var had no effect on me sexually, no increase in drive, no southern swelling, nadda, but my natural test levels are high naturally so I may be the odd one out.
If she's hurting from the friction of intercourse, find yourself a good lube, even if you don't think you need it, it will help. If you're going at it for a long time, reapply now and then. ID lube and Platinum Wet are two of my favorites, both for long lasting lubrication and the lack of taste for when switching to oral.
If she's having a lot of orgasms, maybe the pain is simply a soreness similar to what we get when we're training other muscles of the body. Rest to repair may be what's needed. Try some oral and anal sex and let her vagina rest for a few days. She can practice daily kegels in the future to help strengthen the vaginal muscles.