Answer:
The answer is plateau phase of sexual arousal.
Step-by-step explanation:
The plateau phase of sexual arousal is the point of sexual activity which a woman starts experiencing increased sexual excitement before orgasm (climax).
Asides a leveling-off (a steady level) of sexual arousal, other bodily responses occur during the plateau phase. The bodily responses - according to Masters and Johnson - include expansion of the upper third of the vagina, tightening of the vaginal opening, and increased sexual tension.