That's Jennifer Weiner writing on a topic I have seen as long as I've been reading the news for women (i.e., since the 1960s). Body anxieties heightened by the desire to wear a bathing suit. The Facebook part is new, but I don't think that's why the NYT is publishing this piece in late August. Weiner makes no mention of the French "burkini" issue, but I think that's what's pushing this old American topic forward right now.
Here's that Facebook photo showing the suit she picked picked out. It's a lot less silly looking than "ruffled pink trim and a little slip of a skirt" makes it sound. But Jennifer Weiner is 46 years old. Why is she resorting to a skirt with pink ruffles to deal with her body anxieties? I was researching the burkini issue and got to thinking about women who want more coverage for whatever reason — religious or other expression, modesty, sun protection, aversion to shaving — and I discovered these swim capris (and swim tights). I hadn't noticed these before, so I'm thinking there are many women — possibly including Weiner — who are locked into thinking swimwear must expose your legs (if not half or more of your buttocks). It's odd, because Weiner discusses the Olympics, and the Olympic swimmers — female and male — all wore suits that covered their thighs.
I'd like to encourage women to think about wearing swim separates with the longer legwear, capris and tights. 2-piece suits have been around for a long time, so the tops are easily available, both bra tops and tankini tops.