Well my take is ...Anitha is playing very smart with Ahem...she knows Ahem from the past, his thoughts, his behavior etc & thats the reason she is not directly reaching out to him.
She is first making sure the external environment is all set according to her favour & then she is going to reach out to Ahem & show him how the people he cares, his wife, does not care for him & how his mom today feels that she, Anitha is so settled in Modi family.
Why is she doing this & not reaching out to Ahem directly, because with her past experience, she knows Ahem loves his family & his mom especially & would do anything for her, she has seen him give up on her !!! So what she sees between Ahem & Gopi she feels it is out of responsibility he is in this marriage for his mom & the day she knocks his heart, he will just turn around to be with her forever !!!
As per the 1st plan, she ensured she created doubts in Gopi's mind by none other than her own husband words & since she thinks Gopi is innocent it will be easier to break this relationship. She wants Gopi to doubt Ahem & either fight & Ahem does not have peace of mind & comes to her or just break her marriage & walk out after realising he does not love her or simple after the relationship fails, she will be there for him & make him realise the hidden love for her in his heart !!!
The 2nd step she is implementing is making Ahem's mom realise how wrong she had done in life of her beloved son by choosing the wrong life partner. Again she is triggering it from Ahem shoulder as he stood up for her by not agreeing for her marriage. Thats the reason though she could have rejected the marriage proposal herself, she ensured it was triggered from Ahem's end. From here she wants to show Koki how her son Ahem loves her even today & how she (koki) had come in between his happiness & how she is the one who understands him & has the right stature in society to be his wife & Modi's bahu !!! She thinks the distance between Ahem & Gopi will also help her in this !!!
Once she makes Koki realise that when she will get to Ahem...so far she is moving his heart with her pain, how she is alone, how he had left her & their time. they spent together in the past along with making him realise how he had taken a wrong step to marry his mom's choice & not her. Once the time is right she wants to make him realise how he is in his marriage without love only for his mom & how his only love is she, Anitha & how her only love is he !!! She then plans to tell him how Gopi does not want to stay in this marriage & how his mom is fine & happy with their relationship now after realising her mistake !!!
She is ensuring Ahem is kept in darkness all thru by sharing only her pain & is triggering all her goals from his shoulder. She knows he cares & worries about her pain & somewhere he still loves only her & but because of his mom he is unable to clearly express it to her. She knows if she approaches him directly he would immediately reject her & that will be the end of her !!!
As Ahem is seeing only her pain because with him she is being careful & along with the guilt of breaking her marriage, hence he is not seeing how Anitha is destroying his marriage. The day he realises how he himself is responsible for what has happened , how Anitha whom he thought as a friend & whom he was trying to help her , how his Gopi, his love has suffered because of all of this , that day Anitha will be ripped apart by the ruthless Ahem Modi !!!