While watching yesterday episode I was thinking it why would Meet father's would agree to marry another daughter from the same family with his son. If anything he would have walked out leaving them dry and insulted. But they played the Kundali card and I don't believe in all this but he has always been superstitious so at least there was some reasoning for him to agree.
I am not sure but @sujz was saying something about the kidney transplant in BK. I guess the makers have skipped that part.