SO and I have always split our family's expenses evenly. Such as diapers, clothes, groceries, gas, an other necessities. We each have our own personal bills but they're almost identical because we go through the same insurance company and cell phone company. We split our monthly YMCA bill and I pay the Gerber insurance so he pays the Netflix because they're the same amount pretty much. There's been many times though, that while he's at work, ill randomly buy a decent amount of stuff for DS when were out. Either because I have some extra money to spend, there's things on sale that I'd love for DS to have, or simply because we need it and I can buy it myself. SO has done that a few times also, but no more then twice in DS's entire life, because I'm always with him after he's off work so we always split everything when we go out. Now when we go out to eat or movies or most other outings, he pays for us all.
Ok anyways ill get to the point. I lost my debit card a few nights ago and am waiting for a new one in the mail. SO knows I don't have a way to get $ out of my bank because its closed Sunday, but he was fine with paying for necessities like gas and food. But last NIGHT we go to Burlington to get DS a toddler potty and new shoes and I say before we go into the store "ill pay half of the balance when my banks open tomorrow." And he says ok and we go shopping. At checkout the total is $58 so he says "when we get home and I ask you for $40 you're not gonna be mad right?" And I said "ill give you $30, the total is $58" so SO says "Plus the $10 from giant eagle earlier" (grocery store)...so I agree to give him the $40 and we walk out to the car and as we're loading DS into carseat I say "im fine with splitting everything like we've always done and I agreed to pay you half for this trip, but I think counting down to the exact penny every single time is ridiculous. For the rest of our lives are we always gonna be splitting every last expense ? That's not how married couples do things, or even most couples with kids. (IMO, I'm not actually sure cuz I don't discuss finances with my married friends lol but I'm going by some of the married people I know or when I was growing up and watched friends parents do things or my parents do things with $)... So he gets cranky and says fine just give me 20 then! I said that's not the point and why are you getting mad? I'm simply saying I think it's a little cheap of you to hold me to every last penny.. And that was that.
Oh and all the times I've went shopping without him for stuff for DS, when SO comes home ill show him everything I got because I always love showing off the cute things I pick out for DS, but I've never once asked or expected him to pay me half for it!