When a woman hears wonderful things about her husband from another woman…uske kaan kharay hojate hein. She may never admit it but she’s watching that woman now from the corner of her eye. So your friend A has been kind of careless and now she has to deal with it. You will have to distance yourself from her.
Friends who encourage any negativity in a marriage…are not real friends. Its best you find a way to distance her from them. I hate to say this because it sounds like I am asking you to control her but some people are not strong enough to bounce off negativity. Some women DO get influenced by what others think quite easily.
Agar un hazaron mein se ek apke naak pe akay bait jaye…to farq parta hai.