> I remember reading about Frosts personal life at one point, and learned that he had a very conventional marriage for decades before his wife passed away. Some time later he began having an affair with his friends wife. My memory is hazy here, but I think I recall looking up the year that Road Not Taken was written, and it was during this time he was having this very unconventional late-life period.

He wrote "The Road Not Taken" 23 years before his wife died, your suggested time line does not add up.