Understand

"Good. That's how relationship works, alright? I was just worried you spent your time with your team leader rather than being with Feline." Sean also got confused. Was she trying to control his decisions in life? Of course, she had to. But Sean was now a grown up adult who can do whatever he wanted. 

Why does his mother wanted to distance him from their team leader? Is there a story behind it? Sean shrugged it off for now. He didn't have time to mingle around for now, and he wanted to rest. Sophie walked past ahead of him, saying, "You should get some sleep. I'm sure your stomach's full now. You need to rest or Feline would throw up in the middle of the night, looking for you and will try to bug out an answer from you in the morning."