No matter how far you’ve gone, you always have the right to say no. Even if you were the one who asked or initiated sex. You always have a choice. There are lots of ways to get out of having sex but it’s normally best to just be honest and say you’re not ready or you don’t feel like it tonight. Your partner should respect your decision. If you’re under 25, the sexual health charity Brook have some excellent advice on dealing with sexual pressure.