India today reported that Sasikala and her husband Natarajan, were allegedly aware of the fact that Jayalalithaa, the former chief minister of tamil nadu was not in very good health, and may not survive her entire term after the elections in 2016. So during the elections, they probably selected their associates to stand for assembly election so that these MLAs would remain loyal to sasikala and her family , in case anything happened to Jayalalithaa.
While national english channels like Times now, India today, NDTV, CNN News 18 are fairly diplomatic in reporting the news, as usual the bengaluru based News 9 had the inside story on the new CM of Tamil Nadu. They are now reporting that Sasikala was only a proxy, the entire show was managed by her nephew TTV Dinakaran , the son of her sister and new chief minister Palanaswami has already given his resignation to TTV Dinakaran and his associates, which they will submit at a suitable time. A woman Chief minister will usually get more publicity, media coverage, so TTV Dinakaran, smartly made Sasikala appear to be the replacement for Jayalalithaa.
However it is reported on News9 that TTV Dinakaran also has some cases, filed against him, and as soon as the matter is resolved, he will become the CM. Like many single women in India, Jayalalithaa did not have any person who she could really trust, everyone betrayed her, due to the mindset of indian society, which ruthlessly exploits older single women. So though Sasikala allegedly betrayed her, Jayalalithaa was forced to trust her, and it could have been a major mistake.