In light of the promos released in the last week, I decided to repost chapter1 because it was so prescient and accurate as to what the show writers were planning to show. For the record, I think this is what I see as ANDY's thoughts and interpretation of the situation and her impression of Sam - THEY ARE NOT MINE. I don't think Sam let his family, Jerry or Andy down. With the exception of Jerry, they ley him down by putting him in an impossible position. He's always been enough for others - Always. The writers are teaching both Sam and Andy a lesson here:
Andy: that she needs to drop the Cinderella Complex - she isn't more deserving of happiness than anyone else and that life isn't a Disney fairy tale. Other people do matter. Andy has never put Sam first or given his feelings any thought or consideration. While Sam would never give Andy an ultimatum like she did to him, the writers are going to do it for him, and it's about time.
Sam's lesson is that he isn't responsibe for the choices and decisions others make. He's always taken too much on his shoulders starting with feeling responsible for lying for his father, then about his father. Loyalty to one doesn't mean equate to disloyalty to another. Taking responsibility for his child doesn't mean he's letting Andy down.
Ultimately the onus is on Andy to grow up and take responsibility for her own life and choices and to finally stand behind her words. If she really loves Sam, this shouldn't be an issue.