Knowing human nature as I do, I would say that your Mum was for a long time hoping for this to happen. Other wise why would she allow you to share her bed. Think about it - She is a grown woman of 37 years, who has already had a son (so she knows what it is all about) and she also knows that teenagers get terribly horny.It is only natural for her to want you to think that you were the only one awake and enjoying it. Further adventures while she "sleeps" will prove this to be true. As one reply stated - "Next time listen to hear if she is making noises that would indicate that she is in fact enjoying it" I do not condone what you did, nor do I condemn. But If that is the way you want to live, and you take the necessary precautions to avoid pregnancy, and you are both happy with what you are doing - then so be it.
I do not condone what you did, nor do I condemn. But If that is the way you want to live, and you take the necessary precautions to avoid pregnancy, and you are both happy with what you are doing - then so be it.