Stop in for a cup of coffee

This is a 1802 house, bought it and started fixing it up one room at a time then got this crap so it stopped. Really bad what's going on in there a log/joist under the tub must have had years of water leaking on it and it is rotted out. Really in a bad spot also. Prob needs a floor also since the tile is coming loose. Just sucks I am not that way in general.