No. There is no common ancestor, so they are not related.
if your sims spouse has a brother or sister then they will be your sims brother or sister in law
Yes
There would be no relationship as you do not share a common ancestor. If your brother-in-law is married to your sister, then her daughter is your niece, her husband would be referred to as your niece's husband.
Your sister in law is your husband's sister or your brother's wife.
The English language has not special name for the cousins of your spouse. You could just call them by their first names like you would your friends. If you really like them, you could decide to call them your cousins.
Your wife's sister's husband is your wife's brother-in-law, but is not related to you.
your sister and brother in-laws
Your mom's uncle's daughter is your mothers first cousin. Their son would be your second cousin.
Not at all. There are many men and women who date and consequently marry the siblings of their brother-in-laws and sister-in-laws. Some folks may find it strange to "keep it in the family", but there are many success stories of this nature. Technically, your brother or sister's in-laws are not YOUR in-laws, and you have no real legal relationship to them. If my fiancee had a nice brother for me to set my younger sister up with, I'd go for it in a heart-beat.
that would be the persons brother-in laws-cousin which would be too frickin far to have any sort of real name!!!!!!
If you get divorced from your husband, all of his relatives stop being referred to as your in-laws.
Your brother-in-law is your brother-in-law because he married your sister and his siblings are are only her in-laws not yours, so his sister is just your brother-in-law's sister. She's not related to you to you. Your brother-in-law can also be the brother of your spouse. In that case, his sister is the sister of your spouse, and your sister-in-law.