I was in a bit of a rush when I made my previous comment so it only has my initial impressions. I just thought I'd post again and make a few more points now I've had a chance to think about the strip.
Back in the autumn of last year, when there was a lot of discussion about whether Jeph would write in a time skip, one of the points I raised was that, as Claire's studies approached her finals for her MLS degree, the workload and her stress would increase greatly. We can see this is coming true: Claire is finding out just what burdens there are on educators and the degree to which it impacts on your home and social life! Is she having some second thoughts? It might be interesting to know. I think it's lovely that Marten is trying to support her and help her relax but I'm not sure how much help he can be!
Marten is a surprisingly good-natured house-husband. Then again, being the key support structure for a career woman is sort of a role for which he has a natural aptitude, isn't it? In the end, I think it's all about the relationship - Claire is special enough to him that he wants to be there for her and to help her reach her life goals. I wonder if they've used the 'L' word yet?
Finally, I suspect that we're the next day from when Claire and Marten ran into Sam and later Marigold. The fact that Claire is again coming to the apartment direct from college makes me increasingly sure she's moved in to the apartment over the time skip. It's an interesting call on Jeph's part - He's chosen to skip over the drama and to-and-fro, should I or shouldn't I dilemmas; does he think that he's already addressed that adequately with other characters or did he want to jump over the cookie-cutter soap script on the subject and get onto writing about how Claire and Marten function as a next-stage couple?