They were both sitting on Simon's legs and enjoying his pampering. As such, Cecilia who got jealous couldn't help but argue with the twins to get down.
Theodore: "Nope don't wanna~"
Maybell: "No"…
Cecilia wanted the twins to get down so she could sit on Simon's lap herself and the twins who didn't want to obey. It was like a daily occurrence and nothing new to anyone.
"Hehe, we were the first to greet master therefore we are allowed to sit on his lap as long as we want. If Princess Cecilia has any problems, she can just beat it"
Theodore commented in an attempt to further incite Cecilia.
"Alright you two, it's time to get down" Simon put the twins who tried to protest down from his lap.