Kiya
1922
may fourth
No it not true
If your brother-in-law is the brother of your wife then his mother is your mother-in-law. If your brother-in-law is the husband of your sister, his mother is not related to you but is your sister's mother-in-law.
Reshmas husbands mother is her mother in law. Rams wifes mother is his mother in law. Therefore Rams mother in law must be Reshmas husbands sister in order for her to be the daughter of Reshmas mother in law.
If (as a man) you married your sister-in-law's sister then her mother is your mother-in-law. If (as a woman) you married your sister-in-law's brother then her mother is your mother-in-law. If your sister-in-law married your brother then her mother is not your mother-in-law.
Howard Carter
Ankhesenamon, his half sister.
20
Howard Carter
I would just call her my second mother