The night after I had made love to Chantelle, Sylvia and I had just gone to bed when she asked, "So how did l'instruction go with Chantelle?"
"Very well," I said. "Did Gabrielle mention it?"
"Yes she did," she said. "Gaby said that Chantelle told her all about it this afternoon. She said that she was a bit surprised at Chantelle's reaction."
"Oh, why was that?" I asked.
"Gaby said that she didn't expect Chantelle to go through with it, because she thought that she was a lesbian." Sylvia said.
"What!" I exclaimed. "Why would she think that?"
"Because Chantelle was spending all of her time with her friend Jasmin," she replied. "Besides, Gaby knows a little about lesbians."
"And how would she know that?" I asked.
"Before Papa gave her l'instruction, Gabrielle was a lesbian," Sylvia replied calmly.
Wow! That was a shock! But it explained a few things. Gabrielle had been married, and she had two daughters so it had been more than a marriage of convenience, but I had always wondered why there had been no men in her life since her divorce a few years ago. She was an attractive woman, and I knew that she must have had offers. So maybe she had decided that she preferred the company of women after all, I thought.
It took me a while to recover after that bombshell, and then I said, "Well, at least Gabrielle was understanding about Chantelle. You should know that I explained to Chantelle that it's OK for her to keep seeing her friend Jasmin. Maybe you should mention that to Gabrielle."
"I'll do that," Sylvia said.
I was still coming to terms with the idea that Gabrielle was a lesbian. "So does Gaby have a girlfriend?" I asked. "I mean, I've never seen her with anyone."
"Yes, she does have someone," Sylvia replied softly.
"Who is she?" I asked. But then the expression on Sylvia's face gave her away. "You mean .....?" I spluttered.
"Please don't be cross, darling," she said. "Gabrielle is my sister and I love her dearly. I love you as my husband, only in a different way."
I was stunned. For several seconds I couldn't say anything, as I tried to come to terms with what was happening. But I remembered how passionate Sylvia was every time that we made love. There was no way that she could be faking all of her emotions, so what did I have to complain about, I thought. So my wife was bisexual. There was no reason why this fact should affect our relationship.
I leaned over and kissed Sylvia. "I'm not angry," I said. "Surprised, but not angry. Gabrielle is lucky to have such a passionate lover as you."
Sylvia threw herself into my arms and ground her pussy against my leg. I slipped my cock into her pussy and fucked her hard and fast, and she gasped with delight, and then screamed with pleasure as she came.