About a year and a half has passed since my sister and I first talked to Eddie and Ellie about sex. Since that day, Charlene and I took some precautions to make sure Eddie and Ellie would be safe when they were ready to do what my sister and I have done for nearly 30 years. Ellie had uterine caps inserted in her womb about six months ago, when it was first discovered that she was starting to become capable of reproduction. It took a few more months after this, but Ellie would also receive a prescription for yiffberry candies that she could take as an added form of protection. Charlene and I kept them in our room for safe keeping, thinking that it would still be a little while before Ellie was ready to have her first sexual experience.
She also started to grow larger during this time, going from 4'2" in height last year to 4'7" now, growing at the rate of about 1 inch every other month. She also began to develop breasts, though they were barely noticeable underneath her shirts. It wouldn't be too long before Charlene would need to teach Ellie about bras, though neither one of us knew exactly how large they would actually become once she was fully mature.
Her twin brother was just starting to undergo changes himself, though he didn't seem as far along as Ellie. He had only grown 3 inches since we had "the talk" with them, matching his sister's current height. It seemed like in the short-term Ellie would grow faster than her brother, though in the long-term Eddie would end up being the taller of the two, though we wouldn't know by how much. Given how they were genetically similar to us, it was likely that they'd both end up around 5 1/2 feet tall (give or take a few inches) when they were full-grown foxes. More importantly, it didn't seem like Eddie was producing semen yet. He continued to dry hump his sister when they slept together, but it didn't seem like his testicles were making sperm.
As for their behavior when they were together, it seemed to change a little from when we first talked to them. Eddie and Ellie still did things together, but it seemed as if Eddie was starting to become a bit more interested in Ellie romantically and probably sexually. One time, I went to go get the kids for dinner and I ended up walking in on Eddie embracing his sister from behind, licking the side of her neck while she allowed him to do so. Ellie seemed to enjoy the gentle and warm licks of her brother's tongue, suggesting that she probably felt the same way about her brother as he did for her. It reminded me a lot of how I was with Charlene when we were around that age, right before we finally got the chance to experience sex for the first time in our lives.
"Do you love your sister, Eddie?", I commented in a soft and polite tone when I saw how he was treating her.
Eddie immediately stopped what he was doing as he and Ellie both started blushing. "Dad! Ellie and I are trying to have some alone time!", Eddie exclaimed, feeling embarrassed about me walking in on them. As I observed the two, I noticed that there was a bit of a bulge in my son's pants, suggesting that he had an erection for his sister.
"Relax...I know exactly how you two feel. I had a crush on my twin sister when I was your age", I explained calmly to the pups. "Anyway, you two can get back to what you were doing later. It's time for dinner, so why don't you go get cleaned up and meet your mother and I in the dining room", I added.
For a moment, Eddie and Ellie seemed a bit puzzled. I never mentioned anything about a twin sister to them, so this was expected. "Wait...we have another aunt you never told us about?", Ellie asked curiously. "Where is she? Why haven't we seen her?", she continued before I calmed my kids down.
"I'll explain everything to you after dinner, OK? For now, get your twin-tailed butts into the bathroom and wash up. Your mom and I will be waiting in the dining room", I replied in a calm but more serious tone, getting the kids to get up off their rumps and go do as I asked. Meanwhile, I went back downstairs to the dining room where Charlene and the rest of the family was gathering.
