Answer: he came to this conclusion by observing Ilene's exhibition of lordosis behavior
Step-by-step explanation:
Lordosis behavior which is also called mammalian lordosis which refers to the body posture that shows that the subject is ready for sexual activity which is usually naturally displayed by mammals such as elephants and cats.
Signs of this behaviour are putting down the forelimbs whilst the rear limbs are stretched with raised hips,arched spine and continuous movement of the tail; curved spine with apex pointing at the abdomen.
"she is leaning in, pushing out her breasts slightly, and making a great deal of eye contact" This statement or sentence gives us an idea of Ilene body posture and body langauge at this moment which can be commonly interpreted as sexually inviting to the witness hence we can say she is displaying lordosis behavior.