We’ve been seeing a lot of posts about multiple accounts using the same IP. When this happens, the casino will usually close the account, and worse, they might even confiscate the funds. As gamblers, we want to be honest and follow the TOS, but what if you’re living in a house where your family also loves to gamble and you all use the same site? Is it reasonable for the casino to close your account for multiple accounts, even though you didn’t actually create them, but because you share the same IP, that’s what they see?
Considering the fact that we have seen cases in the past where people got banned or blocked from casino platforms for having two accounts registered under the same IP address, I wouldn't recommend doing it. There are so many casino platforms, and a lot of them are trusted and reputable, I don't see any harm in one of the family members having an account on a different platform which would solve this problem before it even starts.
Asking support team for assistance regarding this is also a good option because then you will have the word of the team which should give you clear directions about what you should and shouldn't do in this situation, but if I were in your place, I wouldn't do it.
If it's me and my spouse where both are interested in gambling, I would create accounts on different platforms only to avoid facing problems such as getting the accounts banned and funds confiscated.