With younger real sister

I and my younger sister live alone in due to work and we have been intimate since we were young. Recently 4 months back when we had our sex which ended up with creampie causing her become pregnant not only that getting her abortion done was a big task due to all documents that they were asking in which we had a success and we again started having sex recently. Since then she and I have been discussing a lot about our kinks of how our sex will be if she become pregnant and have a child. We are 22F and 26M.