Honestly sounds that your wife is not a sexual person in general. It's why Dr Rodman Whiten says if your partner only wants to have sex once a month during the honeymoon stage, that's not going to get better, and she is likely asexual.

When I was a mid-adolescent I had a raging libido and would masturbate multiple times a day. Even now, in my late 20s, I masturbate almost every day. In fact, I have a higher sex drive than my male partner.

I guess what I'm trying to say is, that for women with average to high sex drives, they would have been very horny as teenagers. Rather than not being into sex at all.