I don't think Jon has made any secret that he hasn't been 100% faithful, he admits as much in Bed of Roses, but I've never heard anything about Dorothea giving Jon permission to play away.
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These days the stars seem out of reach
But these days there ain't a ladder on these streets
These days are fast, love don't last in this graceless age
Even innocence has caught the midnight train
And there ain't nobody left but us these days
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