My SIL has a 4 year old son and since he was born she has been saying that he should marry her brother's daughter. (my+husband's daughter, who did not exist at that time. Marriage between cousins on the maternal side are common in my state.) This was often expressed to my husband via Skype, within my earshot. I did not like it and told my husband to nip it in the bud. He thought it was an innocent desire and does no harm. I gave a IRL example of such a brainwashed girl who married her deadbeat cousin against parents' wishes(they no longer approved) because she imagined herself in love and is extremely unhappy now. My H got convinced and used to tell them clearly not to have such wishes about other people's lives. As it turns out, I now have a daughter, few weeks old. On Skype, my MIL and SIL prompt my nephew to call her 'XYZ wifey'. Of course it will never happen, but it boils my blood. Apart from everything else, the very idea of my daughter becoming my SIL's DIL leaves me frothing at my mouth. So far I have not said anything to my husband, nor do I intend to - because he always tells them strongly and firmly not to say such things. But they don't seem to understand and bring it up every other time. In a few months, we will go to India so my sick MIL can meet my daughter. I am sure they will bring it up with me directly. Please give me some tips so that my head doesn't explode when it happens. My MIL is a well trained martyr and is sure to play the sick card. Is there any diplomatic way to get it into their heads that both of us don't like this proposal and it will not happen ever? So that I don't have to hear it again and potentially repeat the same thing for 20+ years. I have other marriage troubles in control for now as my husband isn't letting others interfere in our life. I know this is a non issue and so maybe I should just ignore it. Very irritated and I guess just venting.