Katherine was portrayed as very business-like and abrupt the first few times we saw her. She made a very insensitive comment about not expecting the memorial for Jon to be "an all-day" thing.
I think she and Eddie just grew apart and had resentment towards each other for perceived faults. She may have resented Eddie for being a househusband, and he may have resented that she worked so hard and was not always "there" for him, stroking his musician ego when needed. An obvious lack of communication and understanding caused a rift which grew wider and wider.
Delilah did make the first move. They fulfilled a need in each other. Affairs suck and there are no excuses for them - but there ARE sometimes reasons. People who engage in affairs are playing with fire, and many get burned, very badly. But I am not ready to paint every person who has an affair as a garbage human being. I have very close loved ones who are less than perfect people. I'm sure I'm not the only one.
I loved this episode. It really brought the drama. Gary is way too extra but I understand his feelings with regard to Maggie. He thought they were both all in, on the same page - now that she's better, she's wavering. I guess I'm Team Gary on this one.
Regina wanting to adopt is both sweet and complete and utter bullshit. Why can't a woman say she doesn't want kids and mean it? Ugh, such a copout.
Sophie smashing the guitars was completely understandable, and Eddie gets it. When she picked up the red one I yelled out loud "Not the Stratocaster!" I'm not sure it actually is one, but it looked like it to me anyway, lol.