Another blue tit blip!

I’ve spent quite a bit of time today watching the blue tits coming and going from the nesting box in the hope of seeing one of the chicks, but no joy there.
I was reading that sometimes the female blue tit will pretend to be a chick by fluttering her wings in the hope that the male will feed her, thinking she is a youngster and I think I saw that the other day.
I think these two are looking a bit “ragged”. Not surprising with all their flying back and fro.