Long time family friend.

So this girl has been a friend of my family for many years almost like a sister. She moved away about 12 years ago and always came back just to visit my parents. Every time we would see each other we always kinda playfully tease or just kinda trash talk each other. She recently moved back into town and is around a lot more and it’s just gotten worse how we playfully joke about each other. Never really crossed any sexual lines. She is 13 years older than me though so big difference in age. The closest thing that got close to sexual was a day I made a comment on how there was no such thing as good pussy after 40 years old and her response was well I’m 47 no kids very few partners I know I got good pussy! Jokingly I said sure I’d have to see it to believe it. And she got a bit red in the face and a slight smile but then she couldn’t respond because people came into the room with us. I got left unknowing smh! But still every time after it still been flirtatious vibes in my opinion. Thoughts please? I’m so into her though just love our friendship/relationship