Maybe it was a "secret" between the Aunt and one or both Niece(s)? I'm trying to think of a better word because "secret" implies a negative and that's not what I mean. You know, one of those bonding things? "shhh don't tell Gramma but we found this super cool lake/bike trail!" Or "we met this boy..." (though they do seem a bit young for that). They "confided" in their Aunt and if she felt there wasn't a reason to be nervous about the ride/trail in such a small town environment, she didn't feel the need to break the girls' confidence and say anything?
I don't have personal experience as a parent but I've heard this can be a good thing and healthy. If the kid has someone they know they can confide in and talk to about stuff they're maybe not so sure about telling their parents, even GREAT parents, they might also confide in that person about much bigger stuff later. At 8 or 10 it might be admitting to sneaking off to the lake, at 12 it might be "this boy wants to kiss me." If the kid trusts someone in the family to talk to IMO that's a good thing, and it'd take something pretty serious to make it worth breaking their trust and telling Mom/Dad/Gramma/whoever. Obviously possible/likely abduction counts as serious and then all bets are off IMO. Maybe that's why Aunt T. is now talking about it?
I'm not a parent but as a real life example, just to explain what I mean in terms of it being sort of an "innocent secret." I knew my neighbors' son had a "girlfriend" before they did because we went to the fair with our neighbors and the son pulled me aside to ask for advice about buying a girl a gift. He wanted to get her something nice (as you're going to find at the fair
) that he could afford. He wanted to make sure it wasn't cheesy, TOO nice and might scare her off, but nice enough that she might kiss him. Maybe even <gasp> on the lips. The kids were both around 12-13 so definitely at an age where lots of first "on the lips" kisses or first serious crushes happen and I'd even seen the girl before when they walked past our house - it was obvious she liked him. I didn't think it was anything bad, but he begged me not to tell his parents because he was afraid they'd think he was too young and wouldn't let him talk to her. He also also wanted to make sure she was "the one" before he introduced her to them... lol I just now remembered that and how cute it was. Funny thing is his parents aren't super conservative and his Dad probably would've high-fived him for liking this girl, but for whatever reason the son just felt more comfortable talking to me about it.
I don't talk to him regularly but over the last 8 years (holy crap I feel old), every so often he's confided in me or asked my advice about things and I know that likely wouldn't have happened if I'd told his parents about the girl/gift when he was younger. In his high school years I'd like to think I steered him away from a few bad situations... even some situations he KNEW were bad but he didn't quite know how to get out of, wasn't comfortable talking to his parents about it, and I hope/think the advice helped. He has great parents, it's just one of those things. IMO it's good for a kid to have someone they can confide in as long as that person has their best interests at heart (parent, relative... the best interests is the most important!). The fuzzy part is when does that person need to stay the confidante and when do they need to talk to the parents, IMO and all just my personal experience.
OK sorry that story got really long.