Ladies please answer. When you know that you orgasm? What are the signs?

I have problem to know when she orgasm and try to
make a contribution her arousal before my ejaculation but it is firm and i am not sure if she is happy and fill or not or she does fake orgasm. so i want some ways or technic which satisfy her. or know if she orgasm or not.Ladies please answer. When you know that you orgasm? What are the signs?
I reflect it varies from woman to woman but I one-sidedly do the following things:
arch my back...high-ranking
moan in pleasure
out of hand leg spasms
and
i c**.
So any of those signs could lead you contained by the right direction.
As long as you are hitting her G-spot or giving her clitorial stimulation, then she should hold a real orgasm. Letting them build up is also a means of access to garuntee a memorible orgasm. Like letting her about to hit one and after stopping it before it happen. Also, she could do the same to you and by timing it right, you both can orgasm at indistinguishable time.
you can make ur girlfriend own an orgasm by putting ur finger in her and rubbing her g-spot or buy sex toys