No because you are not involved in the marriage. Your husband's or wife's sister would be your sister-in-law. Your son's mother in law is not related to you in any way.
a cow
Sons would be plural and son's is possessive. Tickyul
Duncan's sons
The Latin word for sons is "filii." However, in that sentence, 'sons' is used as a direct object and therefore must be in the accusative case. Therefore, you would say "filios."
She can't stop you from sleeping with your husband.
she would be your grandmals sisters sons daughter =)
If they were my sons...I would be one proud mother. But they could never be my sons-they're all older than me!
If it was a boy then he would be your sons half brother and if it was a girl she would be your sons half sister.
he said that his sons would be more successful than bernard
I am surprised that you would even consider living with your mother in law! Tell her "no" unless you plan on being stressed out for the rest of her life.
no
i would hate it