Maya believed that Sunlight had no idea he held a fondness for Shana, an inclination for closeness. It was also because he hadn't thought that much about it, therefore, there was no restraint to control himself. Maya thought that Stone was half right, Sunlight indeed had certain feelings for Shana. But Maya didn't believe that Sunlight would develop a deeper relationship with Shana. The biggest reason, of course, was Starlight; both Sunlight and Shana would hit the brakes when they realized something was amiss. After all, humans are rational animals.
Secondly, Sunlight wasn't Shana's type. Who was Shana's type? Strictly speaking, Lin Wu was half suitable, as Lin Wu was someone Shana didn't mind flirting with and dating. To say that Shana liked Lin Wu wouldn't be entirely true; with Shana's personality, if she really liked someone, she would definitely fight for it.
As for Lin Wu...