Only about 30% of all women can reach orgasm in penetration. It's totally normal and quite common that you can't. However there's a difference between not being able to have an orgasm in penetration and not being able to have orgasm in sex.

Sex isn't just penetration there are a lot of other ways you and your partner can both enjoy sex without you having to fake it and have orgasms, how about oral sex, how about sex toys, how about a hand job?!

The movie ideal of ending every sexual interaction in a mutual simultaneous orgasm is really misleading and totally not true to life.