Explain to them that you are going to love this baby, boy or girl, and hope they will do the same. People do not get to choose the gender of their children, and it's possible that you could have ten boys and still not give "them" the girl they are hoping for.

Then, tell them the shelters are open, and they could each pick out a girl, canine, feline, cavie or lagomorph - of their own choosing. If they still complain, explain the "Big Brother/Big Sister" program to them. I'm sure there are girls out there that need positive female mentors, right?

You, not they, are responsible for the children you bear. This is your life with Mike, not theirs, and while they may MEAN well, they should soon realize they are being unreasonable.