1) non consummation of marriage amounts to mental cruelty and is ground for divorce
2) wife can file for divorce on grounds of mental cruelty
3) if husband is impotent wife can file for annulment of marriage on said ground
4) wife has to prove allegations made of impotency
5) you can undergo potency test to prove you are not impotent
6) you cannot be forced to undergo potency test but adverse inference can be drawn if you fail to undergo potency tests