Not a “huge” age difference, but … When I was 20-21 there was a little girl, perhaps 9 or 10 years old, with whom I had regular contact. It was quite obvious (to everybody) that she had a huge crush on me. I made a conscious effort to do absolutely nothing to encourage her, for obvious reasons. That effort included specifically asking some older women (around my mom’s age), who seemed to think the situation was “cute” to stop doing things to encourage her. Things like asking her, “Oooh, are you waiting for Rik? He’ll be out pretty soon!” when they would find her hanging around outside the room I was in.
That contact lasted only a year or so, after I moved on (for completely unrelated reasons). I didn’t give the girl a second thought.
I bumped into her a few years later in a convenience store parking lot. She came up to me and said “Hi” and struck up a conversation. At the time I didn’t recognize her (possibly because I was drinking a lot at the time and I was probably hung over), but it was apparent that she knew me, so I just played along and talked to her for a few minutes, wracking my brain the whole time trying to figure out who she was. We parted ways a after a short conversation. Later, at home, I realized she’d been coming on to me (again, my alcoholic state at the time was probably the reason it took me so long to figure that out). I’d thought she was pretty hot, so I resolved to keep my eyes peeled in case she visited that convenience store on a regular basis, in hopes of meeting her again.
I never saw her there again, but that was just as well because a few days later I finally realized who she was. I counted off the years since I’d first met her, did a little math, and realized she must be all of 15 by now. Okay, well, forget that.
However, the next time I saw her, on a city bus a few more years later, I recognized her right away (I’d quit drinking by that time) and this time I initiated the conversation. It was immediately obvious that she was still very interested in me. And that she was hot. And that she’d grown up into something of a horndog. And it just happened to be her 18th birthday…
It was fun while it lasted, which was all of two weeks. Then she sort of just drifted away. All I can figure is that either I didn’t live up to the image she’d built up in her mind over the years, or she just wanted to satisfy her curiosity and once she’d done that there was no need to stick around.