Illustrations paragraph 7

The same applies to telling the groom about the bride's family. If the bride has an internal illness that cannot be seen from the outside, and if the groom knew he would not agree to the match, he may tell the groom if all the details are met. This is not a ban of rechilus.

Also, if it is heard about the bride's family that their home is immodest — which is a big reason that could destroy the whole purpose of the marriage — he must tell him, even if the details above are not met. But first he must think whether his words will be listened to. In a shidduch it often happens that the groom will not listen to him, and later it will lead to rechilus.