Mumbai, April 26 -- Poonam Sinha, wife of actor-politician Shatrughan Sinha, joined the Samajwadi Party (SP) last week and will be taking on Union minister Rajnath Singh of the Bharatiya Janata Party (BJP) in Lucknow. In an interview to Hindustan Times, she talks about why she has taken the political plunge and the unusual dynamics in the Sinha household. Edited excerpts:...