This is from a monologue of a young woman about her strange love (it's a large part of a long, multilayered story, with a lot of archaisms).
"Jetzt tändelt er mit mir und neckt und foppt mich, und ich weiß nicht, woran ich bin. Bin ich ihm lästig? Ein Kind, so wohlgetan? Sieht er nicht die Frau in mir? Was für ein Spiel treibt er nur?"
All the definitions of "wohlgetan" or "wohltun" I've been able to find (which isn't many) don't seem to fit. There hasn't been any interaction between them for the guy to praise her, and the other option seems to be that somebody there is feeling good, but I don't understand who... Another option I see is that it's to indicate a sort of condescending stance, that he treats her kindly but not seriously.
Edit: Link to the author's page on Wikipedia
The title of the book is: Das Spiel des Sängers