Your kitchen must be huge, just look for the paint damage on the counters, appliances and walls. Confronted with this evidence, she will surely crack.
But in all seriousness...I gave up years ago trying to convince my wife that she is indeed the one who scrapes her bumper all to shit and rips the belly pan partially off while parking. She legitimately does not realize that she does it. There is no time to pay attention to your surroundings and do simple tasks correctly when you are late (women always are), overcome with emotion (women always are), having your period (married women always are) and talking on the phone (you have to tell someone about how upset you are that your cramps have made you late to the mall).
She probably did it on a curb or block while parking and doesn't even realize it.