Sentence:  "She would have come a few months ago, and gladly: I'll write to her." / "Better talk to her, and persuade her." / "I'll do that too, but I must write to her first". / "So do then; but whatever you do, don't <WSD>shilly-shally</WSD> no longer." 
Meaning of the word marked with <WSD> tags:  To procrastinate.