Manipulation of genitals really boils down to intent: for examination, or for sexual gratification.
All females who've been to a gynecologist knows such specialists will manipulate their genitals for examination purposes, using a speculum as the patient sits in a chair with stirrups, etc, but most will do it in a cold and clinical manner to make it clear to the pt they are medical professionals who maintain the dr/patient relationship at all times, and are not some pervert who's doing it to get their jollies.
A few gyns have crossed the line and abused their pt's trust by inappropriately touching in an attempt to sexually-stimulate the pt (or even whipped out their own member to rape the pt), etc, and faced the legal consequences. Fortunately, such situations are rare, but there's a few MDs who are serving time in prison for such crimes.
As her non-gynecologist husband, and from your own admission, your touch was sexual in nature.
OP said-
during our engagement, we fooled around and touch each other down there. It's not a "tap" but definitely is not "stimulation". I tried to convince my wife, who, after 5 years of marriage, strangely felt guilty all the sudden, that its not do called porneia. Well i am fading and shes still in, so thats probably why i'm not guilt ridden.
I'm wondering what could motivate such a case of late-onset guilt, and the prime suspect in my mind is you've been fading as you learned TTATT, and she's scared and at her wit's end about what your waking up means to her; she's grasping at straws, literally trying a last-ditch effort to force the issue to a head (no pun intended).... She's likely making a power play here, trying to get the elders on her side. Proceed with caution.
If you haven't had a heart-to-heart talk with her, reassuring her of your love for her, now might be the time. Appeal to her authentic personality, and if you don't know what I'm referring to you should read Steve Hassan book (Jgnat will be along to recommend the title; brain fart, as I don't remember it).
BTW, do NOT profess your "unconditional love" for her, unless you mean it and you're willing to follow her demands that you "return to the flock and repent", if you're not willing to do so.
Adam