My wife and i just became sexually active 2 weeks ago.she complains of pain without pleasure during sex. what could be the cause?

Many reasons: There many reasons for a woman just starting to be sexually active to have pain during sex. It takes a while for her body to accommodate the penis and she can be very sore and raw from the process even if it is very gentle. I suggest that she uses a lot of lubrication and also you should allow her time to heal. The pleasure usually comes after she becomes familiar with her body and the act of sex.