When Billy Beanbuckets gets permission to have a friend for the night, Mom doesn't realize that ``Oliver'' is a pig whose whole family will come too. ``A guest is a guest, and we must show them our best,'' says Farmer Beanbuckets, but after the rest of the farmyard joins the invasion he finally declares, ``...when enough is enough, you have to get tough''—whereupon the ungrateful animals thrown the Beanbuckets family out of their own house. Lively illustrations extend the tall-tale humor, right up to the good-humoredly logical conclusion that follows. (Picture book. 4-8)