This topic has hit very close to home for me, and so I will share something extremely personal because I think it's relevant to the topic. And it also speaks to the violence that anyone can experience, not just sex workers.
In my third year of university, way before I became a sex worker, I was raped by an ex-boyfriend. And it took me almost four years before I admitted it was even rape and stopped blaming myself.
I suffered from severe depression at the time, and was in a vulnerable spot and I didn't want to be alone. I called him and he refused to come over unless I agreed to sleep with him, and because I was so desperate for company, I agreed, even though I did not want to. When he got there, I told him I wasn't going to sleep with him and he got very irate. He said he wasn't leaving unless I slept with him because he "didn't come over for nothing." I continued to say no, that I wasn't up to it, and I started to cry. He unzipped his pants, laid back on my bed, and told me to "get on." I shook my head and he just stayed in the same position and repeated how he wasn't leaving until he got what he wanted. So I fucked him. And I cried the entire time. And I blamed myself for giving in.
Rape doesn't need to be violent for it to be rape.
I took the following from a rape survivor website:
If your partner has sex with you under any of the following circumstances, it is rape/sexual assault:
Physical violence i.e. hitting, choking
Threats with weapons
Continuing sexual activity after you have indicated you wish to stop. (It doesn't matter if you initially consented; people change their minds for a number of reasons all the time. Your wishes should be respected).
Overpowering you with physical strength, pinning you down
Threats to harm you or a third person
Threats to your property/pets
Threats to rape you if you don't give in -that basically says "let me rape you or I'll rape you" - sex gained under such a threat is rape.
Depriving you of liberty until you acquiesce to a sexual demand; i.e. "you don't leave this room until I get what I want".
Having sexual intercourse with you while you are sleeping or incapacitated by drugs/alcohol to the extent that you cannot give or withdraw consent
Refusal to allow you to sleep until you give in to sexual demands (note: sleep deprivation is a recognized form of torture)
Sexual activity after continuous pressure on you to have sex before you are ready, to perform acts you have stated you don't like; or just going ahead and doing it.
Putting you in a position where you must engage in one form of sexual activity to prevent something "worse" from happening i.e. you have to engage in oral sex in order to avoid anal rape.
It is important that you realize you do not have to have physically fought or even said "no" for an act to be regarded as sexual assault. Tears or other expression of discomfort are more than reasonable indicators that you do not want the sexual activity. Often, sexually violent partners do not actually seek consent, or if you do say no, it is not taken any notice of.
Remember that submission is not the same as consent.