To "crapdad"'s credit he didn't give up when that first excursion went so wrong (haven't we all been there and got the tshirt). Thought his wife was a bit of a shrew - cue sudden awakening to how awful her last 10 years had been (sorry dear, but didn't look that way in the beginning) and she really played up to the role by dolling herself up again for the return but letting her self go at BIL's house. Seemed a bit phony. Also thought it was a bit hard on the youngest child (Morgan? aka Tot) who was perhaps wetting herself out of the stress of it all.
Wasn't really sure about the other couple. They did seem to treat it with more of a sense of humour and nice stroke putting lock on the playroom door! How did she feel about him blowing their holiday fund on her SIL I wonder ?
Have taped the follow up programme to see later.