Monica has been experiencing recurrent pain during sexual intercourse with her partner, although she does not lack interest and can become adequately aroused. Monica MOST likely suffers from:

Dyspareunia

Explanation:

Dyspareunia is pain occurs during sexual intercourse and other sexual activity. The pain of Dyspareunia may be superficial or very deep depending on the disease progress. The reason of this pain may be vaginal dryness or disorders of the genital organs, or too little arousal before intercourse and many other reasons. The bases of diagnosis of dyspareunia is based on symptoms and a pelvic examination.

Treatment: dyspareunia can be treated by the use of antibiotic or anti-fungal therapy.