Come to think of it, with things largely being digital nowadays, do many people even have a photo album still? I suppose those of us in our 20's and 30's might but I imagine not many do or add to it still
This is kinda lost in translation but at the end sis actually takes a big jab at our guy for being spineless.
She says これだから (which was translated to "ugh, of course") which is vague but basically implies "it's because you freak out at stuff like this that you're still a virgin/can't make a move" which I feel is way more blunt/ruthless.
One day soon the sister will abandon her wish of integrating Hina into their family. After all, Asahi is better at pushing her away than getting closer to her.