Girls good evening))) I have one husband like a child or is it with all of…

Girls good evening))) I have one husband like a child or is it with all of them?)))) In general, my husband really loves BMW and my husband's father prefers Mercedes. Now my husband drives a Nissan. In short, he wants to sell this Nissan and buy another car from hand so what's the whole point of it? The husband argued with his father and me that if I go for two ultrasounds now and they tell me that I have a girl he buys a Mercedes, if it's a boy then a BMW. My "child" is 25 years old. ????