Need help

okay so i watched naaginn since the beginning but since school started i missed sooooo much!!!! I got up till the part where amrita marries but I thought she could not be a naaginn once she gets married? so i would like some one to give me a quick summery from then up to now. and when did MaaSa/triveni become evil? i am so confused😕 nd i don't have time to read all the summaries...can some one give me a quick summary? i doesn't need to be too detailed like bullet points are fine...please some one post!