The New Yorker's terrific cover this week shows two moms reading a card while their children peek from the next room. Artist Chris Ware explained his thinking behind the image in a blog post titled "Happy Mothers' Day." That should come as no surprise; the magazine ran a cartoon in 2011 in which a girl with two mothers explains to her teacher how she punctuates the holiday. But as I pointed out then, "Mothers' Day" doesn't necessarily reflect all lesbian moms.