Yes and no.
We do have "joint" accounts that forward to both of us, but they mostly used for business so that we both get copies.
But we also have our own accounts. Hell we even have our own surnames domains for really private (family or official stuff where it's easier to give out
firstname@surname.com)
We have access to each other's computers obviously and have and will send each other on them to get something, there's nothing to hide. But we very much respect that each of us are individuals, and even down to forum and IM accounts, we would never use each others email or accounts.
If REBEL posts then it's REBEL posting, if HF posts it's HF posting. We each make our own enemies and would never show a lack of respect to each other by using the other's account and making them enemies they don't know about LOL