I am a wife, and I am very deep into this hobby... always have been. I don't have problem with my husband saying no to me because there is a reason he's saying it, and 9/10 times I am really only joking about getting another tank. I do have plans for future tanks but we also live in a small house right now so I am fortunate to have 3 tanks up. As is my tanks take up one wall in the living room and the small tank takes up a good amount of space in the kitchen, and that is why he says no.
It's not like I have my fishroom and we have the money for it but he's coming in and putting his foot down. Besides, I would happily choose him over the hobby. I come from parents that were together for 43 years before my mom died, and I want this to be my only marriage for my future kids sake.