Most wives want hubby there in the beginning of their relationship with a lover. It's not long before hubby is asked to remain elsewhere while the wife enjoys her man - much easier for her to reach orgasm without hubby there distracting her.
She seems so satisfied by the experince that she induces an instant relaxing state to the viewer. I guess that if the world were to end, I'd like to spend it in her exact tranquil posture and feeling. Feels like pure human serenity. She is the perfect specimen of mankind!