I know the content guidelines say I cant write anything that ENCOURAGES illegal sex acts or anything illegal in general, but if i put a disclaimer explicitly saying i do not condone this, please dont fucking do it you moron, will it be ok? asking because while the sex isnt truly important to the plot, the only way the character would have sex with the mc at this point in time is through rape and slavery.
You have to ask yourself, is it is really necessary? If your MC HAS to screw this character, it doesn't necessarily have to be through rape. There are very few instances in which a writer really could use something so powerful as rape for the benefit of the story. For example, if the rapist is the MC, it serves to paint him/her as an absolute piece of shit. On the other hand, if the victim is the MC or someone the MC cares about, it serves to fuel him/her quest for revenge.
You should know that after the deed is done, there is no turning back. The victim is going to be traumatized for the rest of his/her life, most if not all victims of rape end up hating themselves for "being weak", feeling tainted, and forever scarred. IT IS A LIFE-CHANGING EVENT. Even people who avoided being raped end up traumatized in some way. Do your due research.
The rapist is going to end up pretty messed up as well, especially if the person didn't meant to rape his/her victim, for example, if he/she was convinced that the victim was consenting. On the other hand, if the rapist forcefully has his/her way with the victim then the person was already pretty messed up even before the deed. Most rapists don't feel guilt, in fact, they feel emboldened to continue raping. You have to realize that you just can't paint this kind of person in a good way, even if he/she committed the rape as an act of revenge.
If you plan that the rapist later shows remorse and tries to make it up to his/her victim, be wary that is going to take probably the rest of their lives. No sane person would stick around someone who had raped them. The mere sight of the rapist is going to keep traumatizing the victim. Most rapists that come to regret the deed end up taking their own lives to escape the guilt.
If it's absolutely necessary that you include a rape scene in your story, do your due research first.