Lie about it

You really don't want to give away the fact that you and Tanya are very fertile right now, and have a deep desire to be impregnated by them. "Oh, the leaking breasts? We were taking turns with a breast pump, trying to prime our milk glands. Wouldn't you guys like to taste some mother's milk?" You look at both of them in a saucy manor, and give them your sexiest smile.

"So, would you two studly men like to come in for a drink, maybe even have your way with a couple of nearly naked women?" Tanya asks.

The straining bulges in their pants say it all. "You both look really hot!" exclaims Tanya's brother. "I have a feeling I might be committing **** before this night is over."

Jamie looks over at you, and smiles. "Ellie, if you asked me to fuck you right now, there's no way I could say no" he says to you. "You're the hottest sister any brother could ever hope to have. to be honest, living with you all these years has been driving me crazy. I daydream about what it might be like to fuck you."

"Well" says Tanya, "it sounds like you two have made up your mind to fuck your own sisters instead of each other's sister. Am I right about that?" Her eyes look like horny slits of deep desire. Even you feel that same deep desire, and you know what it is. It's a desire to be bred by someone's cock, and your brother saying the things he does only adds to it.