I should know better, but here are my thoughts:
I concur with several here that the couple are in their mid to late thirties, but I am 64 and early fifties can look young. I also don’t think the woman looks skinny, about midway on the HWP scale in my opinion.
As for “pedophilia”, I confess to being a bit scandalized that the thought comes up in anybody’s mind from the picture, really.
Reflecting back on times past I can picture a not un-similar image from the 1950’s or early 1960’s, including a dog and / or cat, but with some differences of course. Mom would be sitting at a Wurlitzer home organ or spinet piano (wearing a dress but the hair length could be the same). Dad would be standing next to her facing the children and leading a family sing along; (He likely wouldn’t be in a suite as this is a less formal family affair but he defiantly would be wearing dress slacks, a shirt AND tie, with a sports jacket or sweater, and SANS beard). There would be three to five (or even more) children sitting on the floor. The angle of their gaze would be the same as the children in the picture in this thread but I don’t think anybody would think they were staring at dad’s groin or mom’s derriere.
I am not meaning to argue against anybody else’s perspective but I thought another perspective could be held also.