She leaned in and gave me a soul touching deep kiss as my hands explored first the outside and then inside her robe. Things accelerated rapidly from t...ere as we all quickly disrobed and kissed moving from one mouth to the next in almost a fluid motion. Then she quickly announced that they should properly welcome their guest (me) and both went down to give me a BJ. First they shared and then he took over while she talked dirty to him in his ear. Come to find out this was his first MM experience. .. study?"Then I broke into a grin.She looked shocked for a bit then broke out laughing."I guess that would be the right way to go about getting a good grade, wouldn't it?" she asked with a chuckle.We had a good chuckle at that then went on to study algebra for a bit. With the one-on-one help, she was able to better understand what we were talking about and could do the work very well by the end of an hour together.By the time we finished, I could feel my stomach rumbling. I hadn't eaten for. Sue let out a little yip as he quickly bit at her swollen clit. teasing her clit and licking all the moisture from her sex he kneaded her soft ass. sue spread her legs for his play. now with one hand reaching up and rolling a nipple between his fingers he took the other hand and started to fuck into that deepest of holes. in and out, up to suck the finger clean of juices and back into her. sue pulled him into her pussy and ground her hips into his face forcing him to suck and lick without. I couldn’t move. I didn’t know what to do, what to say, I’d been caught red-handed intruding on her privacy.She waited and didn’t say another word. But I could tell it wasn’t a wait to see if I was actually there, it was a wait that said no matter what she knew I was there. Finally I stood up and walked to her bedroom to find her standing in front of me still with only a pair of knickers on.“Mom I’m sorry.”“Tsk. It’s ok honey but why are you doing this?” She replied. Still amazingly calm.