Do you think sex is inevitable when guys penis is in a woman's vagina?

I'm talking about the guy is sitting down and the girl is on the top of the guy. They're not allowed to move their bodies, no touching, no kissing, just feeling each other through that. It's like the penis just inserted in vagina without doing anything except just looking each other and feeling it.
Do you think sex is inevitable when guys penis is in a woman's vagina?
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