Or God healed her, but that's not possible because there's no way that those of us who beleive it is a curable sin could be right about it.
Sorry, tha sounds REALLY rude, but I' frustrated. I'm sick of hearing how Christians like me choose to deny stuff that doesn't fit their beleifs and then look what happens when I bring up something that goes against other's beliefs.
I had a very good friend that was lesbian, and was going to come out to her mom, when she met a guy that she really loved. She even married him.
Did she "become" straight? No. She identifies as bisexual. She is still attracted to women, but is with her husband because of who he is, and not his gender, necessarily.
One might argue that she's been "healed", and "become straight", but she still considers herself bisexual, even though she lives a monogamous heterosexual "lifestyle". She still goes to GLBT Pride, and is very understanding of people who are gay.
Sexuality is indeed a complicated thing.
Do people change?
Most gay people have had boyfriends or girlfriends in high school, but didn't suddenly "change" when they came out. Nor will they say that even if they had a sexual relationship, that they were heterosexual then. They were just living as a heterosexual. Big difference. They often go along with social pressures, even if it is against their nature, just to fit in, to please their friends, to avoid ridicule or worse, etc.
If you say that your mom went from 100% lesbian to 100% heterosexual, I would be curious if it is your opinion, or what she herself has said. If she has truly done a 180, then she should be a poster child for change.
I have yet to meet 1 - even 1 - person personally who "used to be gay." I have met gay men who used to be married and had children (they were trying to be straight.) I have met lesbians who have dated men, and found they were bisexual. I have heard about men meeting up with married men, so I will count that as bisexual or closeted. I have met a few men in my 20s that "found Jesus, and changed", only to be having an affair with a sponsor, or see them a few years later with their boyfriend.
But not one person that has "changed." If I had met a lot of other people that were "former homosexuals" it would be easier to believe.