Yea gtshubha is right about this. Doesn't matter if the guy ejaculated or not, if the penis penetrated the vagina, then there's a risk.
Whatever I understood from here, with or without ejaculation receiving vaginal sex is a risky action. The female can come close to the contact of pre-*** which does contain HIV. So please do a blood test is required. However, if it's only for one time, the risk may be low. However a blood test is always required.
Thanks Sunny One, I am aware of the 3 months test rule, what I wanted to know was if there was a risk if transmission without the exchange of seminal fluids...?