Wife is pissed

I have that problem sometimes too she will throw a tantrum about spending anything on the cars .she used to say i need this or i need that the car doesnt need that new part . I would respond with you have clothes make up food a roof over your head and the bills are paid at which point it would become a screaming match . I got smart I tell her im getting something she throws a tantrum i sit there and say nothing just look blankly at her . when shes done i get up calmly say im not arguing about i grab my keys put my shoes on and walk outside I stay there all day then at night i plug the camper in to the house and sit out there on the computer .
She comes out and then its ; are you coming in?
i shrug my shoulders ,
Her: honey please come in im sorry just please come inside I sleep better when your laying by me . Im sorry I shouldnt have gotten mad I know you love the cars and they do need work so will you please come inside now ?
Me: ok fine . let me put my things away .
No arguing from me and i get an apology all is well , I get laid that night and we are both happy the next day lol