Yes, that's also my thinking, especially if they're related to one another, like husband and wife, or any member of a family... it's common they're using same address. Don't know if there's written forum rule here that prohibits using same wallet address.
Do you use the same bank account as your wife, family or friends?
Do you receive all your salaries to one account?
Do you hold your money in your fathers/mothers/wifes/childs/friends/cousins/uncles/whatever wallet?