a finger ring,,,some flowers,, a candlelight dinner and take the wife to her favourite place.
it is an anniversary
This would be your crystal anniversary.
An "uncle by marriage" would be your spouse's Aunt's husband.
You would be their Aunt (by marriage).
The wedding anniversary gift for 65 years of marriage is blue sapphire. Death
A pack of condoms
She would have to talk to him about their marriage and whether or not they should stay married.
The difference probably is just semantics, but some countries (like Germany) require a civil ceremony; church weddings are optional. In that case, the marriage anniversary would be the date of the civil ceremony, while the wedding anniversary would fall on the date the couple recited their vows in a church ceremony.
because he can
Your husband is a polygamist. I would suggest that you see a lawyer and go from there.
Traditionally the 10th wedding anniversary is tin or aluminum. Tin and aluminum represents how a successful marriage needs to be flexible and durable. A good gift would be a tin paper weight that represents the strength of the marriage. A modern representation of the 10th anniversary is diamonds. Diamonds also represent the strength and durability of the marriage. A pair of diamond earrings or a tennis bracelet would make a great gift.
Unless you are in a polygamous marriage, you are your husband's wife, so you would call her your mother.