"I wish you would do anything I ask you to do without question and that you also can't harm me in any way but instead take care of me" Mark said as his wife froze for a moment as the wish took effect.
"Yes honey I understand" she said with a forced nod.
"Good" he replied then looked down at the coin in his hand and thanks to his new intelligence decided to take some precautions, "I wish that this coin only works for me and that it also never leaves my side" Mark said as the coin disappeared in a flash before reappearing around his neck tied to a chain.
Satisfied he then turned to face his wife thinking of the best way to take advantage of her new obedience.