My girlfriend agreed to slap for money

I need a Clear opinion on thiswe were having a decision where we had this argument when we got this topic as what if we get to chance to bag a million dollar and wheather she'll slap me or not for that amount of money and she agreed to it that I'll slap you and both will be benefited as we can both enjoy that money but I said I wouldn't slap even for a penny because our love is imp more then the money where I can't slap without any reasons just coz of the money and the thing it was about money so I wouldn't do any anything to her for money so I need openion on this and she also mentioned she only do this for slap and nothing else like maybe cheating or betrayal of me so am confused now