The Secret Passage

Short history of my home, built in the 1850's and was in a state of disrepair when I bought it (2015). I was renovating it myself and it was at a slow pace. I done it between my work commitments and had finished the master bedroom and bathroom so I could live on site. The kitchen wasn't a high priority as I don't cook, but I had removed all cupboards to allow easier rewiring of the house. I'd seen some rot in the floor and decided to fix it and pull up the floorboards and found another basement. The Basement I already knew of only was under the fronts section of the house and I'd thought the kitchen was a later add on. But it wasn't there was a wall put up to divide the basement at some time and an extra staircase from the kitchen to the divided section installed. I thought it was made a pantry at first. But found the trapdoor was hidden and that I thought was strange. Then while in the basement area under the kitchen I found a secret door and behind the door a tunnel/passage to where I didn't know, and it seemed to be a long one. It seemed to lead in a direction to a neighbor's house. But unable to follow it at the time as it was very dark, and I didn't want to risk it without anyone knowing. I hadn't met my neighbors at the time and thought it was perfect reason to get to know them. But it would have to wait it I had more time. While I was away working the following week, I done some research on my house and its history and found the area was a hotspot for the underground railway for escaping slaves. I decided to take some leave and on returning I went to meet my neighbors. There were 3 women living there and I introduced myself and told them of the secret passage, they had no knowledge of it or if there was an entrance in their basement. We went down and had a look and couldn't see any but decided to go back to my place and try from that end. One stayed in their basement, and one would stay at the entrance at my end, and one would explore the passage with me. With flashlights and a broom, we entered the passage. Using the broom to sweep away cobwebs and we got to the end and could see a light thru a crack in the wall. We called out to the woman abasement to turn off the light and then mark the wall where she saw light from our flashlights. Once done we all returned to their basement and found where the entrance was. It had been plastered over at some time and forgotten about. Removing the plaster, we were able to enter the passage from their end. The women were happy with their secret passage and those 2 were lesbians and the other a sister of one. We started meeting regularly and I and the sister started a relationship. Fast forward a couple of years (2019) now married to the sister and having one child and another on the way. I was asked to father my now wife's sister's baby and her partner's as well. I agreed and now I've 6 children 3 with my wife and 1 with her sister and 2 with her partner (twins). The secret passage is still secret as only we know of it, and it has lights and is used to get from one house to the other. I've the perfect relationship a wife and her sister and her partner as lovers, the lesbians do like a bit of cock now and then.