He sensed the way Xue Ning had tensed as she eyed his crotch, and realised that seeing his cock now might be too much for her - she might think she needed to reciprocate!
That thought was nice, but Jingwei wanted Xue Ning's hands on his cock only when she was desperate and hungry for it, and not when she was thinking of returning a favour.
There would be other opportunities in future. Even if there weren't, he still wasn't going to push Xue Ning to do something she wasn't comfortable with!
He decided to make his point clearer. He murmured in his ear while he embraced her, gently putting her hand over his warm cock. The pants were also wet, but Jingwei knew that part of the wet patch was formed from the precum that gathered at the tip of his cock the moment he saw Xue Ning's bare breasts in the shower.
He then gently traced the curve of her lips with the thumb of his other hand, pressing on the middle of her soft plump lower lip.