OP, I’m not saying it isn’t wrong to lie to people to convince them to have sex with you and/or marry you.
But, I’m wary of calling it “rape”, because we already have a tendency to call a lot of things “rape” that aren’t. As I type this, here’s a Moral Theology topic asking if gossip is “spiritual rape”. There’s a post in Non Catholic Religions about ex-Catholics that actually equates poor cathechesis to priests raping boys, and claims "People leave because they were intellectually, morally and physically raped by the leadership. "
And in the secular world, many gamers will brag “oh yeah, I totally raped him” to simply mean, they defeated their opponent in some overwhelming way. Some also will say “I got totally raped” to simply mean, “I got cheated”.
If we just keep expanding what “rape” means the word will become meaningless. And then you wind up with people questioning the whole concept. Or differentiating “real rape” or “legitimate rape” from the other types.
Now, last I checked, lying to people is sinful anyway. It’s also wrong to lie to people to convince them to, say, invest in your business, or contribute to your charity. I’m not sure I’d call someone who does that a “thief”, though. Just a liar.