Caught checking out her relative!

When I first met my wife we I went to a party with her friends. I didn't know anybody there.
In my car after we left she asked if I'd had a good time.
I said well, it was kinda boring not knowing anyone - but I did have fun for about 20 minutes.
"What happened for those 20 minutes", she asked.
"Who was the girl wearing the navy mini-skirt?", I asked.
""Why?" she said.
"Well - it was kinda ** - that girl, she had to be a teenager? - was sitting so that I was looking at the ** of her yellow ** for like 20 minutes!"
"Yeah, so?"
"And when she was messing around with her buddy next to her on the couch - her skirt slid way up....she spread her legs more and I saw enough fur escaping the edges of her ** to know that she is not a natural blonde!"
She didn't say anything for a long time, just looked out the car window.
"What?", I said, "Mad at me for looking? - **, any guy would have looked up that cute girl's skirt - the way she was sitting in such a short skirt - of course a guy looks! I'm a guy - So I looked!"
Still looking out the window on her side, she said, "That ** you were leering at belongs to my little sister, and yeah - she's a teenager!"
"How old?"
"16"
"Geez, with that bod she's going to be very popular!"
"Stop it, you perv!"....but she laughed.