It would have been interesting if I had gotten her pregnant? A real possibility at the time. I'm sure I was fertile and I know she was as well. I still remember the shinny backs to her 36C bras from back then and what she looked like from behind with those and her silky panties on, me secretly wishing I could have her in a sexual manner. My mom wasn't shy about my seeing her in just her undies. I sometimes wonder if she was trying to suggest it?
Doing with one's mother is the ultimate taboo; but, it's worth it... My mom was 39 and I was 15 as well. I did seduced for the first time two days after Christmas almost 18 years ago, nothing was the same for us; but, we overcame the fear and continued doing it. The only thing I can't do with her is to get her pregnant; she took care of that long ago. Find your self an older lady and ask her to play your mother's roll the way you would it would have been if you would have done it with your mom..