Asian mother and daughter sex ritual.

So I'm not sure if this is true or not but my wife told me I found it weird so here we go.<br><br>So apparently my wife's cousin(who lives in South Korea) told my wife that when she was a little girl she was forced to do a sex ritual with her mother, where she had to watch her mother masturbate and masturbate while she watches her mother... Apparently this ritual was to strengthen their bond and to show her mother how to do it the right way. <br><br>I was wondering if anyone has ever heard of anything like this before?