'Naagin 7' 31st May written update: Apara discovers Radhika is her long-lost sister

In this episode of 'Naagin 7', Radhika transforms into a dragon and sees Bharani following Arjun's car. She fights with Bharani. Apara makes Arjun cause an accident in snake form. The public hits Arjun. Arjun tells them they misunderstood him. After some time, Radhika finds Arjun and asks about a box. She smells snake and understands it's not really Arjun. Arjun laughs and turns into Pratham. Radhika gets angry seeing this and becomes a dragon. Pratham runs away from there. But Radhika chases him. Bharani arrives to save Pratham. Arjun runs to escape the public. He faints. The public leaves.Radhika video calls Arjun and asks about the box. Arjun shows her the box. Radhika tells him to send it to the right place. Arjun disconnects the call. He transforms into Apara and opens the box. She finds torn pieces of a map inside.Radhika calls Purav and tells him she will reach there. Bharani and Pratham follow Radhika. Apara joins them. Radhika tells Purav that Bharani and Pratham cannot escape from her. Purav asks her not to act in anger. Radhika says Ananta's end is confirmed. But first, she has to open the secret temple for her father. Purav asks whether Radhika loves Aryaman. Radhika tells him it doesn't matter whether she loves Aryaman or not. The fact is, she hates her sister Ananta. She calls her "Maa" while looking at Pragati's portrait.Apara sees this and cries. She asks how this is possible. Radhika says she hates Ananta because her mother left her because of the latter. She will never forgive Ananta. Apara murmurs "di" and goes to Radhika, calling her "di." She says she thought her family was gone, but her sister is alive. Radhika tells her she is Ananta's enemy, not her sister, and will remove Ananta. She transforms into a dragon and attacks Apara.It turns out to be Apara's imagination. Apara is about to go to Radhika, but Bharani stops her. She says Radhika is Jungistani, and Apara has to fulfill her responsibility. Apara says her sister is in front of her, but she can't hug her. She cries.After some time, Apara goes to her room with the box. Bharani tells Adarsh's family that Radhika is Apara's sister. Maa says they are Apara's family now. Dadi comforts Apara. Apara says she won't let anything wrong happen and needs her Naagmani to stop the Jungistanis.Meanwhile, Radhika looks at Pragati's portrait and cries. She says she can cry sometimes seeing her mother's portrait. She tells Purav she will end everything. Purav tells her she will stay with Aryaman after that. He asks whether she can't see his love for her. Radhika is shocked by this. Purav says he is with her because he knows she is in pain. He has lived like her shadow and asks her to understand that her true love is him. Radhika tells him that only revenge is her goal and she will achieve it no matter what. She leaves from there.The next day, in a meeting, Aryaman says something big is going to happen. Radhika's hand is about to get hurt, but Apara comes between them. Aryaman asks Apara if she is fine. Radhika asks why Apara came in between. She treats Apara's injury. Apara says if Radhika is fine, then she is fine. An employee says Radhika and Apara look like sisters. Apara asks whether Radhika also thinks Naagin and Dragon are fascinating. She says she wants to do research. Aryaman learns that an accident happened in the jungle.Later, Radhika hopes the police don't find her box. Baljeet comes there and cries seeing Arjun's body. Aryaman tells Parmeet to take Baljeet away. The police inspector says Arjun was involved in smuggling. He finds a Jungistani flag there.After some time, Radhika thinks she is glad the police didn't find Arjun's phone. Apara tells her she found Arjun's phone and took it. Aryaman scolds her for not giving it to the police. He starts reading Arjun's phone messages. Radhika takes the phone from him and tells him she will handle it.Apara pretends she cannot remove her bangles. Aryaman hears her scream and goes to help her. He helps her remove her bangles. Bharani comes there in Aditya's form. Radhika arrives and asks what is happening. Apara says Aryaman was removing her bangles. Aditya hides his smile and says he is not a fool. He understands what is happening between Aryaman and Apara. He asks her to accept that she is having an affair with Aryaman. Apara tells him that Aryaman is her brother-in-law because Radhika is like her sister. Aryaman gets upset hearing this. Aditya refuses to believe her and tells Apara not to come to his home. He leaves from there. Apara says she will leave the city and starts packing.Radhika thinks she cannot let Apara go. She tells Apara not to go anywhere and to stay there. She leaves from there. Apara thinks her plan worked. Radhika tells everything to Purav. Purav asks what if Apara remembers everything by staying there. Radhika tells him she needs Apara. Aryaman overhears this and says so it is the truth. Radhika is shocked by this.