I don’t get why people do some of the things they do. Yeah, we’re all human and sometimes we are attracted to people we shouldn’t be attracted to. Being attracted to your husband’s brother or your wife’s sister isn’t a crime. It happens. It doesn’t make you a bad person, and if they’re attracted to you it doesn’t make them a bad person; but if the choice to act on your attraction hurts people you’re supposed to love and care about it could be argued a bad choice. I get that lust is powerful and that the heat of forbidden desire can be so intense minds just stop working when the two are near each other, all they can do is feel that heat, and the force of the attraction between them can compel them to act without either of them having any control over what’s happening. But the thing is, as intense as your attraction was for your brother in law and as intense as his attraction was for you, you both still did have control over the choices you made.
So you cheated on your husband with his brother. Now you’re pregnant. What are you going to do? No point right now in bringing up how foolish you were. When have you ever seen a house come out in tact that was aflame with a raging fire burning wildly out of control? You wanted your orgasms from your brother in law. You got your orgasms with a baby on the side. One way or another someone is going to suffer for your choice.