The case was registered against him late on Monday night.
The police said that the 40-year-old woman and Rohit Tilak knew each other for the last couple of years. "The complainant alleged that (Rohit) Tilak repeatedly raped her on the pretext of marrying her," said a police officer.
Rohit Tilak, the grandson of Jayantrao Tilak -- a senior Congress leader and Member of Parliament -- had unsuccessfully contested the 2014 Maharashtra Assembly polls from Kasba Peth seat in Pune against BJP's Girish Bapat.
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