The mafia who engages in sex first but then terms such consensual sex as rape is busted in this case by Delhi High Court.

From Para 14,

14. In view of the above, the Trial Court concluded that the “accused cannot be held guilty for not marrying the prosecutrix because he and his family members were ready for the marriage but the parents of the prosecutrix did not want that their daughter should marry the accused”. Given the testimony of the witnesses, the conclusion that the accused and Ms P did not marry on account of the opposition from the family of the prosecutrix is certainly a plausible view. The only reservation that this Court has to the above conclusion of the trial court is the implicit assumption that the accused was alleged to be guilty of not marrying Ms P. The accused was not on trial for not marrying Ms. P; but on an allegation of committing the
offence of rape.

From Para 16, 17 and 18,

16. The Trial Court reasoned that if the accused had established physical relationship on account of the promise of marriage, she would have disclosed the same to her parents. This Court finds no infirmity with the said reasoning as well. If the accused had induced Ms P to have physical relations on the false promise to marry; she or her mother, on becoming aware, would have disclosed the same to her father.
17. It is important to bear in mind that two consenting adults establishing a physical relationship, is not a crime. Jilting a lover, however abhorent that it may seem to some, is also not an offence punishable under the IPC.
18. In so far as consent to engage in a sexual act is concerned; the campaign ‘no means no’, that was initiated in the 1990’s, embodies a universally accepted rule: a verbal ‘no’ is a definite indication of not giving consent to engage in a sexual act. There is now wide acceptance to more ahead from the rule of ‘no means no’ to ‘yes means yes’. Thus, unless there is an affirmative, conscious and voluntary consent to engage in sex; the same would constitute an offence.

From Para 21,

21. Inducement to have a physical relationship by promising marriage must have a clear nexus with the moment promise of marriage cannot be held out as an inducement for engaging in sex over a protracted and indefinite period of time. In certain cases, a promise to marry may induce a party to agree to establish sexual relations, even though such party does not desire to consent to the same. Such inducement in a given moment may elicit consent, even though the concerned party may want to say no. Such false inducement given with the intention to exploit the other party would constitute an offence. However, it is difficult to accept that continuing with an intimate relationship, which also involves engaging in sexual activity,
over a significant period of time, is induced and involuntary, merely on the assertion that the other party has expressed its intention to get married.