No, she hasn't.Has your wife been pregnant again while you’ve had this 6 year old ?
You're trying to wedge a different scenario in here (explanation of pregnancy/birth). That has nothing to do with Sesame Street making a tweet of some cartoon hands holding each other in a vaguely rainbow arrangement.
Shapiro: "Now explain homosexuality to the children Sesame Street. Oh, thats awkward? Its not appropriate for children? Yes, thats correct".
Errr no Ben, its actually straightforward and easy. I just did it in 2 very simple sentences. Peak Shapiro, as I said.