A husband and wife can both be Members of an LLC.
In fact, the most popular forms of Multi-Member LLC are husband and wife LLCs and friends/business partner LLCs.
Most states treat an LLC owned by a husband and wife the same way they’d treat any Multi-Member LLC.
That said, some states allow marital spouses to file and pay taxes on their joint LLC profits as a Sole Proprietorship.
This is called a Qualified Joint Venture.