Remember that it doesn't mean they don't love you.
So if you decide that it's finally time to let them take a bath together so that you can take some pictures of them being perfectly angelic and sudsy, be prepared for all hell to rain down.
Even if you are positive it will go well because for months you have been prepping them for this freaking adorable rite of passage. Instead they may try to drown eachother and rip your hair out while you attempt to rescue them. All the while your husband will continue snapping away like some kind of war photographer, leaving you with the saddest series of pictures ever.
It could happen. Proceed with caution.
*edited to add a picture after a Facebook uprising ;) This is the end result of a bathtub war. All other pics are not for the public as they contain bits.