and then marys like 'will u two butts get the hell out of the bathroom i'm trying to ~soak~' because they've slowly wandered from the kitchen following the pretty flowery smell of the bath salts and then sherlocks like 'did u kno...' and then starts blabbing about bees following scent trails to find their way back to their hives (an mjn booked a trip on my url thank you VERY much and u kno it)
but because john is still sherlock's number one fan, he's all hearts in his eyeballs and chin in hands and sighing dreamily and sherlock is preening because not only did he get a pat on the bum, he's got john's undivided attention. in the background, mary is rolling her eyes so hard they're probably going to fall out of her beautiful face and sherlock and john have forgotten they're ruining mary's bath time and she eventually can't take the 'did you know' and 'oh my gosh, that's so incredible' and 'i know, right?' and 'tell me more' so she gets out of the bath and leaves them to it and it takes them another 30 minutes to realize she's left them.