In fact, Sharon was originally looking for an opportunity to treat Xenon. The pills she made according to Watson's prescription were very beneficial to his body, so it wasn't difficult to treat and cure him.
However, when she arrived at the hospital, she realized that Crystal had invited a piece of trash like Jenson to disrupt the situation. Sharon believed that with June's personality, she definitely wouldn't let her interfere with Xenon's treatment.
In addition, if she took out the medicine directly, Wallace and June would probably suspect her. When that happens, she wouldn't know how to explain it.
Now that she was treating Xenon through the hands of an expert like Zenith, it saved her the trouble of having to answer their questions.
After all, Zenith was very famous. It was not like there had never been a medical miracle created by him, so if Xenon was cured, it could definitely be explained.