Cucked by... someone?

Your wife became pregnant about six months ago, and you were happy and planning your new life. But today, the doctor told you that you can't have children. And you never could. So who is your wife pregnant by?

Miri, a caring, loving wife who always seemed completely faithful to you. But what if it was all a lie? What if she'd been hiding a lover from you all this time? How can you know?