A lot has happened in the interim; I'll try to update you. The least bewildered by that first weekend was beautiful Sylvia. She took the lead with Mummy, reassuring her that all was well and that things were entirely natural. She was so full of love and understanding. I'm not sure I was that much help initially I must confess. The first decision she took was that we would sleep in Mummy's bed but that she could join us on special occasions. Somehow this wasn't us kicking Mummy out of her bed but sold as us giving her the most extraordinary favour. That first night I fucked Sylvia with unparalleled passion and devotion, of course she was now Mummy and I was forever proclaiming my undying love for her. A naked Old Mummy meanwhile was sat on a chair at the foot of our (now) bed watching and perhaps learning. Sylvia instructed Mummy to lick her clean after I'd cum in her a second time. Mummy methodically obeyed, doing a thorough job. Sylvia allowed Mummy to kiss us each good night but then she was to leave.
Sylvia moved in. She became mother to me and to Old Mummy too. She was our saviour. As she grew to dominate Mummy so our own relationship shifted. She became less submissive, just as I grew less dominant. She deftly handled the tension between Mummy and I. Undeniable sexual tension but tension also that reflected years of an emotionally dysfunctional relationship. Mummy flowered in so many ways, becoming so much happier than ever before. There was a tenderness between us now that had not been there before. Under Sylvia's guidance the inevitable happened and we did finally fuck. I will never forget cumming in my beautiful mother that first time as she urgently clung to me, tears running down her cheeks in joy. My emotions were more mixed. There was anger in my fucking as well as love. Sylvia was sweetly proud of us both and deeply moved.