When you want to call it Q-U-I-T-S, you have a problem. Cancer is hard to get rid of. They stick like chewing gum to the bottom of your shoe.
A brusque insensitive manner will send her scurrying, but if you try to push her too hard, she will simply dig in and hold on. The way she fights back is through nagging-and she has an uncommon gift for that. Far better to work in less obvious ways. She looks for and needs tenderness. Withhold it. Don't let her share in your life, but indicate that her role is merely to wait on you. If this causes her anxiety, as it will, offer her no reassurance. Be moody-this has a direct effect on her emotions.

With him, be dominating, make the social plans, become the prime mover in the family. Make indifferent meals, serve them while grumbling about how culinary matters are the least interesting thing in your life.

Criticize his bedroom approach, his sex technique. He has a secret feeling he's dull in that department, so let him know you think so too. Unforgivable!
Cancer needs affection. Turn it off. Cancer needs emotional support. Be unavailable or too busy. Cancer likes to give advice. Don't listen. Cancer likes old and elegant places. Go to the most plastic commercial joints you can find.

Above all, criticize. All Cancers suffer from feelings of inadequacy, and criticism exploits their weakness.
Tell mother-in-law jokes.