It would surprise you, but you can become a mother even by not liking men at all. One extreme example would be rape, but it is also quite possible below that. Just imagine your husband is a really good friend but you are not sexually attracted to him. This must not stop you from sleeping with him from time to time, to do him good or to award him. You know, I really don't like cleaning toilets, but I do it from time to time to have a clean house .She has children and a husband, she can't be a lesbian. At max - bisexual.
For men, it is a little more complicated, because of a missing erection. But fantasy, viagra or just doing it by hand and telling her you are impotent can get you to fatherhood.