Although it's not immediately apparent unless you think about it, we're jumping ahead to after the honeymoon, with Mary and Matthew speeding toward Downton in their new convertible. Mary asks whose head he thinks will explode first on seeing it, the Dowager Countess' or Lord Grantham's. Matthew: "I should think they'll howl at the moon in unison." Well spoken, Matthew! Did Branson come along on the honeymoon to teach you a thing or two? When they arrive though, Lord Grantham is more impressed by the car than anything else and then he asks Matthew how the honeymoon was, to which the reply is "My eyes have been opened." I wouldn't have thought that sex with his daughter is something Matthew would casually reference to Lord Grantham, but maybe he's talking about the beauty of the French Riviera.
Inside, Thomas finds Alfred with one of Matthew's shirts open in front of him on a table and can't believe Alfred's been assigned to look after him. Anna explains that Molesley is staying on at Crawley House, so Thomas asks why he wasn't invited to do it. O'Brien interjects that Carson thought it was best, and from her tone I wonder if she had a hand in it; Thomas apparently thinks the same as he pointedly asks how that came about. I wouldn't have thought that they'd split Thomas' attention from Lord Grantham if they could help it and besides, he complained about having to look after Matthew before. All the same, he's got a point about not even having heard about it until now. Thomas then tells Alfred that he should only do business with shirts in a proper dressing room, not in a place like this where the shirt could get marked; Alfred, guileless as ever, thanks him, but O'Brien sardonically chimes in, "Yes... thank you, Thomas, for always trying to be so very helpful." Careful, Mrs. O'Brien. I'm on your side, but you're not the only one against whom Thomas might retaliate and I'd say that without having seen the rest of the episode.