Brandy,
Can you bring it up to him? Your Mother? Be prepared for either silence on that one or anger. When I brought up to my own Mother (with my previous pregnancy) that she was younger than me when she got pregnant (as she was initially very angry), she was quiet for a few minutes before she got really, really loud.
Would bringing that up help? Not in condescending manner. Simply put.
"Dad, can you please explain why it was okay for Mother to place a child and then go on to have kids in your marriage but it's not okay for me to do the same? I'm just confused."
I don't know if he'll have a response. Or, my bet is, he'll say something about times changing/openness changing it/etc.
Guh.
