Bharati on track, Poison for Selvi

Muhurtam
After Sivaperumal tells Kadir's parents that any talk of the marriage and related activities when Bharati's mother is in hospital is inappropriate, they resolve to let things proceed as they may, though puzzled and pained.

Kadir runs from pillar to post asking various people to take the initiative. He persuades Kanya's husband, finally, appealing to his ego (and an opportunity to show up Sivaperumal) to take the lead. Kanya's husband (name escapes me) pays a formal visit to Kadir's parents and everything is humming along.

Meanwhile, Kalidas receives an order from his superiors to raid Sivaperumal's quarry. He does so reluctantly, but discovers unaccounted pieces of dynamite. Sivaperumal is arrested by the police, foiling his plan to keep Devayani (Bharti's mother) sedated. Bharati comes in to look after her mother, and the milk where he has mixed in the sedative falls to the ground, breaking.

Selvi
Maya engages an assassin to kill Selvi. Ranjini contrives to admit her into the household as a cook. Maya's conversation with the killer woman is overheard by Piriyan, who tries to warn Selvi, but GJ cuts him off when he says who he is.

The woman (calling herself Kala) poisons some halwa sent by Selvi's stepmother, and gives it to Selvi. As luck would have it, Selvi gets a phone call just as she is about to have a mouthful, but the two children eye it, and Sachin has a go at it. Shortly thereafter, he is in pain, and appears to have fainted. Doctor says he will recover.

Manaivi
Has been running along with basically no story for weeks. Kalpana, who is staying in a hostel after running away, comes across an article in a paper, planted by Arasu, alleging she has run away with Krishna Kumar. She goes to Tiruchelvam, and they proceed to the police station where the inspector still tries to deny he has seen him after the interrogation.

When Kalpana and Tiruchelvam come to her father's place to clarify that Krishna Kumar had nothing to do with it, her parents' eyes finally get opened to Arasu's plots, and her father asks Arasu to release Krishna immediately. He does.

Kalpana decides to stay with Tiruchelvam. Krishna asks her to change her mind about spending life on her own.

Last scene -- Divya, who is going to get married to Arasu, shows Kalpana the unopened wedding invitation from Rohini. When Kalpana peeks in, she finds a note from Rohini to Arasu, saying, "I am in trouble. Please help".

Aside: Hamsaveni drops off her baby on Ramani's office desk. Krishnaveni brings it home and decides to raise it. Neither of them suspect it is Hamsaveni's baby, although their parents know.
This is beyond stretching credulity.