Noah Clarke didn't explain it to anyone, because he couldn't understand himself as the feelings, that lay dormant for so many years, were stirred when he saw Robin Stewart stand up for Monica Baldwin.
Moreover, as the Artiste Director of the Ocean Entertainment, who has always been indifferent to media rumors, he immediately took measures when there were rumors of him and Farah Moore involved in an inappropriate relationship. He used the scandals of a celebrity from another company to quickly divert the attention of the media, effectively silencing any rumors.
...
Irene Summers returned to Ocean Entertainment like a rat darting across the street. She thought she had been careful, but as soon as she entered, she was discovered by both Noah Clarke and Anthony Lewis. Considering their nature of being meticulous at work, it's impossible for them not to suspect Irene's true motives, especially since Noah knew that Irene had ransacked Farah Moore's home.