Innocent or not isn't that situation illegal? (I don't know, I'm asking.) If it was the mother, then maybe it's ok? But since it's an only aunt it's not ok even if it's an innocent situation?
That is a good question and one those who are not locals need to know about. Many guys date women in the Philippines who bring along a chaperone, who might just be underage and may not even be a family member of theirs.
Quite a few years ago a friend in Florida asked my wife and I to meet a lady he had been writing to in Cebu since we would be there anyway and we did, the lady brought along a chaperone cousin who happened to be way under 18, my wife and I took them both out to eat and we all sat and talked and then they went home, technically my wife and I were in violation of the law at that time and since that was before forums and before I ever heard of these laws, it worries me to know that even I could have ended up in jail for doing something perfectly innocent and that I had no knowledge of being against the law.
Also in one topic recently I pointed out the same law
Republic Act No. 7610 which could be used against any of us, if we happen to somehow be in the company of an underage girl or boy who is not related, I think we all know how everyone calls everyone auntie, many ladies call my wife auntie but are in no way related. Anyway guys and gals, keep it all in mind and I guess do your best to never be around someone underage whenever possible.