This seriously is a disappointment. Irrespective of whether or not Puru treated Pritha and Hasti as family, they deserved royal protection.
I mean Ripudaman was the SenPati and he had the responsibility to look at the welfare of king and his family (of course he woked beyond the call of his duties and would have had received a Param Veer Chakra had he been of today), but his wife and son were not employed, so they had no duty to actually work for the royal family, yet they did that, they deserve much appreciation,