I am kind of in this boat. When my wife and I were dating in college we used to urinate on each other during sex and once I pooped during sex. She wasn't really into the poop, but be both liked the urination. Anyway now we have been married 15 years and have a 14 year old and 11 year old we hardly have sex at all and I am really stressed about the finances. I'm always working nights so we hardly even sleep together in the same bed. I enjoy being in diapers and messy while she is away. I hide it cause I'm not sure she will understand what a stress reliever it is and how it kind of curbs my loneliness when I'm working 60 hours a week and doing military National Guard stuff. I'm sure she kind of knows though, cause she has found my diapers once and hasn't said a word. If I get caught I'll just come out completely. Sometimes I wish I would get caught so It wasn't a secret. I wouldn't want my kids to know though. I wouldn't mind if my kids did it, but they have to clean up after themselves which they don't usually do.
Yesterday I was almost caught. I put on a diaper after work, donated plasma, ended up changing a tire and got a haircut. I did #1 the whole time, but I messed after the hair cut and came home. I made supper and ate with my family and walked the dog. (I was double diapered and it wasn't very runny so there really wasn't a smell) Anyway I went into the shower and started to un-diaper myself and my wife came down to used the bathroom. I hopped into the shower before she saw me in the diaper--we pretty much walk in on each other all the time when we are taking a shower. Anyway she didn't see the diaper, but part of me wishes she would have so it could be in the open.