Giving food to a spouse for Mishlo'ach manot
I live with my wife and one of my responsibilities is to do the food shopping. Often, she gives me a list and I go.
If I come home with something not on the list, can I hand it to her on Purim and have it count as my mishlo'ach manot (especially as the the mishlo'ach manot are "ish l're'eihu" and a spouse is "re'im ahuvim")?
We share money but she didn't expect me to buy it, so had she already acquired a share in it so I am not changing its ownership status by giving it to her? Or did she not acquire it because she did not tell me to buy it so she didn't know it existed?
For argument's sake, let's assume that if she saw it in the pantry she would ask before she ate any, out of politeness.