S/O The Ethics of Traditional and Non-traditional Families
No. They aren't compatible but should the ability to breed with one another be a legit consideration for a legal marriage?
Wouldn't this argument also apply to any sterile man or woman? What about couples who can't have children with each other do to the risk of a genetic condition like Tay-Sachs? Should they be denied the right to marry? Should a younger man be denied the right to marry a post-menopausel woman?