You are not along far enough. So let's work backwards:
"Will you teach me how to enhance my Super-Senses, Princess Diana?" if level02gymspokewonder01:
...
"Of course, I need to keep them in shape. And that shape is HU-U-UGE!" if wondertalkbaby and wonderbirth == False:
$ level02gymspokewonder01 = True
...
In Wonder Woman room:
label WonderLevel02Dialogues:
...
"And you're wearing some SEXY lingerie to bed. That means you want ME to joi..." if wondertalkbaby == False:
$ wondertalkbaby = True
and obviously you need to have seen the birth of your child.