she is not a vamp. She is just scared. Long ago, jagya didn't love, even like anandi. but now he s slowly turning around. This makes her weak. She doesn't want to lose her life yet again. Her fears make her rude. She was so confident when she talks(taunts) sumithra, but later when sumithra put forth the facts and threaten her she becomes weak and even broken.
Now she has come across some events to judge jagya.(the way he treats her infront of BM). At least show that some one is doing the talking thing(without hurting) with her and made her understand jagya's double minded character. I don't think she will agree him, once she understands him completely.
and show her as an independent women bringing up her child alone and aanandi happily married to someone else..even show that both A and G visits jetsar family happily.