J oe Schweon knew instantly that his fiancée was cheating. Normally chatty, his bride-to-be was suspiciously eager to get off the phone when he called from a business trip this spring. Lindsay Hoffman’s little secret? She was watching “Mad Men” — a show the couple had been enjoying together — and she wanted to get back to Don Draper.
“Joe travels a lot for work,” said Hoffman, a software saleswoman from Brookline, by way of excusing a solo binge that took her through the show’s entire third season and part of the fourth while her betrothed was on the road.