Saali teri bewa jo tere paas rahegi, Ketu teen kharab ki kahani kahegi.
If your widowed sister-in-law stays with you, it will tell the story of a bad/afflicted Ketu in the 3rd.
In Lal Kitab, specific relatives represent specific planetary energies. Dr. Sharma provides a tragic family *Nishaniya* for a severely afflicted Ketu in the 3rd house.
The 3rd house rules siblings and extended family dynamics. If a person has a highly negative Ketu in the 3rd house, it often manifests as a tragedy in the life of their wife's sister (Saali).
Dr. Sharma warns that if the sister-in-law becomes a widow ("bewa") and is forced by circumstances to come and live in the native's house ("tere paas rahegi"), it is the absolute confirmation that Ketu in the 3rd is completely destroyed. This situation brings immense sorrow and karmic heaviness into the household.