In the last few episodes Survi and Lata kept on begging Kartik to sign and give the property to Tai and he kept on refusing.
And the reason for this could be, he didn't want to give the property just to save his life. Probably he wants to handover his property to Tai whole heartedly, without any conditions and tell her that he is now fulfilling his promise to her that "before looking after his own, he will look after Tai and his family". To Tai this will be like a big slap on her face. I am sure that evil woman will not sit satisfied.
Kartik will restart his life by getting rid of property and money that drifted his family apart. Survi, Lata, Shanti, all three of them said to Tai, that there is no need to play games, she only has to ask once and Kartik will hand over everything to her and that's exactly what Kartik will do.