R147 I think the only reason people are distracted by the supposed beauty are the several references people make (the angry woman on the beach, the younger guy who wants to boink in her house) to it. They literally tell her she is beautiful and looks much younger than her age.
I haven't commented on it because I don't like to comment on most people's appearances, but it threw me every time they said these things because Leda falls somewhere between plain and frumpy, and most particularly, she doesn't look younger than her age.
When the woman on the beach said it, I thought it was an interesting tension between obviously false flattery and a strange kind of patronization of Leda by that woman and took it as that and moved on. But when the young man said it, I paused the movie to look up Colman's real age and I was very surprised to see she is still in her 40s. I have assumed the actress is well into her 50s until now.
So then I wondered if maybe Colman looking older than her real age is an inside joke between her and Gyllenhaal and they incorporated it to make the mood even stranger or for some other subversive reason. Anyway, I did find it very distracting.
To the point of the young guy flirting with her at dinner, I was thrown by that dynamic at first because Leda is so plain and certainly not styled to "get her groove on," but then all the flattery seemed to have been undermined by his asking for the key to her place to fuck the young mother—so it was false flattery not to get in Leda's pants but to get close to her and use her for something she had. If the movie were a story submitted to an MFA workshop, I might have read it as a thematic parallel to Leda feeling used up by her family and then being attractive to the writer she had an affair with only because of the writing she had to offer and not because she was a great beauty or anything.
I feel pretty certain we are not *really* meant to see Leda as a sultry older seductress, but rather to interpret the flattery of everyone on her vacation as different people trying to use her in different ways, and certainly Leda would know the flattery was false unless she were a total megalomaniac with no objective sense of her appearance.
I really don't get the relationship with the family, though. More than anything else, it does make the movie come across as an MFA student project because it's just such a wonky and seemingly symbolic type of relationship. She was obsessed with watching them on the beach like some kind of spy but everything we saw was totally mundane family activity. (Wasn't it? Or did I miss something?) Yet they did come across as crass and dark and strange and threatening but not for any reason that was explained. She refused to move and that angered them, but all of them seemed to have been as fixated on her as she was on them for reasons that in the real world would not have emanated from her refusing to move on the beach. Then the young guy warned her not to get involved with this 'dangerous' family (?), and then the one seemingly 'good one' stabbed her—with a hairpin (?!)—and she maybe died, maybe didn't die.
It feels like student writing, which isn't necessarily bad, but it feels like it was made to be moody for the sake of being moody and not necessarily with any coherent ultimate point. Darren Aronofsky's "Pi" had a similar feel to me, as have some other movies that seem like student projects rather than fully realized films, like expressions of a philosophy that someone is trying to convey to an audience without having fully worked out what that philosophy is.