I also agree with Loveis - what my partner and I both feel is that we 'connect' in a way that we never did with our husbands, which is not to say that we didn't love our husbands, and, frankly, fancy the pants off them for many years.
My mum doesn't get any of this, although she is trying. When I told her about my partner she asked how long had I been attracted to women - she doesn't get that my love for DP is based on the person she is, the values she holds, the views she expresses, and has nothing to do with the fact that she is female. Also, if I really think about it, I didn't love my husband because he is male, I loved him, the person. I've found, and so has my partner, that there are people who get this, and there are people who don't.
My partner's mother will have nothing to do with us, and has written her a letter saying she could accept us being friends (big of her) but can't accept 'the other little bit' (her words), meaning, I suppose, the idea that we have sex, and one of my DP's (adult) children has said she would be delighted if her mother had a relationship with a man who made her happy, but is 'sickened and embarrassed' that she is with a woman, and will also have nothing to do with us.
With attitudes like that, I cannot be surprised that women (or men in similar situations) might sometimes struggle to explore what might really make them happy.