Hi there i dont know if you are still dealing with the situation or you're still getting these replies but I'm sorry to say just reading your post it's almost Clear to me that they were either doing something for sure or so close to doing something I don't care that she was 15 I have met some very very promiscuous young girls that love older men and love seducing older men the fact that she was asking him where he was going and so into helping him and pleasing him I guarantee you he was interested in her especially sniffing her panties I'm sorry they were either having Sex or so close to it I hope that you either got to the bottom of it or divorced him or got her out of your life and you and him moved on.