Can wife access shared account

My boyfriend and I want to get a shared bank account together. We live together and it will make life simpler. I was wondering will his wife have access to the money because he has his name on the account even though I will be the primary account holder?

If the money put into the account is made after the date of separation, then it is separate property and is not subject to equitable distribution, and therefore, it is not divisible as marital property.