You got your mother pregnant, and she’s almost due. You’re still trying to wrap your mind around the fact that you’re going to be a father now. And on top of that, your new brother is also going to be your son. You promised mom that you would take this secret to the grave. Today is her shower, and she’s due very soon. During the party, you get extremely horny knowing that this is one of the last times you’ll see her with her sexy pregnancy belly before the reality of parenthood kicks in. You can't resist, so you sneak away from the guests and pull her into the bathroom then cum inside of her! Later that night, mom gets both you and your sister together for a family meeting. She talks about how things are going to be different going forward, and that she needs your fam to stick together now more than ever. At that moment, your bratty sis can clearly tell that something is up and she storms off upset when mom lectures them, saying they must behave. Next time you see your sister, she says that she knows the new sibling is yours. You ask how she can tell, and she said it’s because of the way you look at mom. It’s actually the same way your sister has been looking at you all of this time, desiring to fuck you. Then she starts talking about how she wants you to use her body. She’s younger and tighter than mom, so why not make her your free use sister? You bring her into the bathroom, and start kissing her. Then you put her on the sink and play with her pussy. She tells you that she’s on birth control, so you don’t need to use any protection. You fuck her face, then can’t resist shoving your cock into her little pussy to see how much better she feels than mom. A few days later, you are helping your sister water her plants and she lets you try out her tight asshole too. As you’re fucking her, your friend comes over and catches you with your dick deep in your sister’s butt! She freaks out, but still lets you finish inside her ass after he walks away, as long as you promise to make sure he doesn’t tell anyone. That night, your sister is doing her homework when you walk in and blindfold her before tying her up. She struggles to take it off, and sees that you and your friend are standing there in her room. You tell her that your friend is going to use her this time. She shocks you by agreeing to let you both slut her out. You both pull your cocks out together, and she puts the 2 dicks in her big mouth at the same time while she sucks you off. Then she gets fucked by your friend, until he has to pull out and cum all over her face. He secretly sets up another time to hookup with your sis, and comes back for more the next day. You catch them and you aren’t happy because they didn't invite you to join. She begs for you to push his cum in deeper, but you have a different idea. You want to punish her for fucking him without you there this time. Since she apparently loves getting fucked by big dicks so much, you dare her to prove it. You take her out to the barn, and bring your pet dragon horse over. It immediately gets hard once it sees her, and she bends over to take its big cock. It hurts at first, especially the big knotted bulge. It’s definitely not like the human ones she’s used to, but once it stretches her out, it starts to feel better with every thrust. Taboo sex is fun, but this is taking it to another level. To you and your sister, the more forbidden, the more you're turned on. Your slutty sis needs a lot of cum, and when she's really horny, she craves it inside of her. Right as she cums, your horse dragon busts too and creampies your sister! A huge load of cum pours out of her pussy. Hmmm, I wonder what mom would say? This film contains 6 sex scenes, and just may be my most depraved movie yet ;)