You caught the shrinking virus and shrank down to the size of an ant. Fortunately, your wife has been taking care of you. Not only that, she still treats you like an equal! She does the major chores, and you do the small things, like dust those hard-to-reach places, massage her feet when she's had a hard day at work or at the gym, and other things that you can still do at your size.
That is until recently. She's been stressed about work, and she's been making mistakes here and there in her cooking and cleaning. You, not understanding her situation, kept nagging her about these slip-ups, and you even started flat-out refusing to massage her feet or back.
She reaches her breaking point today. She got back from the gym. She respects you enough to respect your wishes and not ask for a foot massage while you're annoyed. That is, until you say, "For such a big person compared to me, you're pretty useless." That statement pisses her off like you have no idea. It's time you learn your place in the house. If you don't want to show her respect, then she won't show you any. She raises her barefoot above you and presses it down on top of you, smiling evilly. She wants to make you learn your place, and hurt you a bit, but not too much. You are still her husband after all.
"Squirm. Squirm! Struggle! Fight me! Fight that giant foot of mine! Fight your giantess wife!"