So, Herb's mother-in-law is grumping again about how much she hates her son-in-law, and she quotes Mother Teresa: 'Let no one come to you without leaving better and happier.'
Leaving aside that she's just quoting her to mutter about how that can't happen unless one of them leaves (which they won't, because they're too stubborn). Mother Teresa obviously had an odd idea of "better and happier" - given how she just provided a place for people to die. "Better and happier" equals "dead" I assume...
Oh, silly me! It equals "in heaven"! Of course.... what.