Heaven knows I’m no expert, but I think those quotes are part of longer passages which are Iambic pentameter.
Reading Shakespeare I have noted that he will begin a line with one character speaking and have the line finished by another character in order to keep the form intact.
In any event, as you point out, Babs should have known better.
All she's ever done is speak the words someone else put in her mouth. She wouldn't know Shakespeare from Shinola.
Actually, Shakespeare generally reserves iambic pentameter (and heroic couplets) for emphasis. So not every line will has 10 syllables or iambic stress patterns.
Shakespeare did not write exclusively in iambic pentameter. His sonnets were of course written this way; however, in addition to iambic pentameter and blank verse (unrhymed iambic pentameter) his plays do contain some prose.