She may be given a year as a chance to treat herself by going to a psychiatrist  or taking medicine. He must help her to get rid of any shyness that may be the result of her problem. If he cannot have sex with her, he can get married to a second wife if it is possible for him. Otherwise he can divorce her after paying her all due rights including bridal gift, maintenance and housing during her waiting period.

 

Allah Almighty knows best.