Couple and a Tranny

We stepped down into the Jacuzzi and relaxed. As Lydia stood up her thong panties just barely covered her. She reached over kissed me and with her hands took my briefs down my legs. She bent down and started giving me head. As we rubbed each other with all the bubbles being produced Lydia asked me to fuck her from the back. I entered her wet pussy very easily and started pumping her and her movements baking into me suggested she wanted it deeper. Lydia reached around grabbed my cock and redirected it to her ass. As I was trying to push it in slowly she kept putting it back in and before I knew it was deep in her ass and we humped furiously, as she was massaging her clit with her hand. I could tell she stopped and was climaxing. I pulled out and we kissed. She used her one hand to jerk my still hard cock and she managed to squeeze cum out on her hand.
After dating for a few weeks our sex was becoming more like clockwork, and one night in bed I asked what is your fantasy? She asked have you ever fantasized being with two girls in bed? Lydia said I love watching girls with big boobs when they bounce and have always thought about being fucked while watching big boobs juggle. I said to be honest I think most men fantasize making it with two women. We agreed we would place an ad in an online site for swingers requesting a middle aged female with large breast desiring a couple. I was surprised about all the replies and videos we received from other couples, single men, but few women that wanted a threesome but the man could watch etc. This one reply seemed sincere and she was attractive big breast but was transgendered/feminine. Lydia convinced me we should meet her and invite her over. Her name was Diane, and we met at the same bar restaurant Lydia and I met originally. Diane had long dark hair, and honestly looked more feminine than Lydia. I noticed several men had their eyes all over Diane and her boobs. We all decided that the next weekend we had a date for Diane to stay a few days and just relax with us and we could take it slowly or if one of us was too shy it was ok, we could be friends and just enjoy the weekend together.