Go for the long game.
"Nervously" voice your concerns to your parents. It may outwardly appear that they're dismissing the inferences you're making regarding sister and brother-in-laws intentions, but the seeds of mistrust will be planted. Their eyes and ears will be open.
Play your cards right, poison the well (with close attention to subtlety), and they may very well be left with little or NOTHING.
Tee hee...
"Nervously" voice your concerns to your parents. It may outwardly appear that they're dismissing the inferences you're making regarding sister and brother-in-laws intentions, but the seeds of mistrust will be planted. Their eyes and ears will be open.
Play your cards right, poison the well (with close attention to subtlety), and they may very well be left with little or NOTHING.
Tee hee...