hi could someone explain to me , did lee geom's mother trap him ?

Hi could someone please explain me this chapter , i couldn't understand ?? What did Reider meant and why wooyeon was coughing and crying ???

Can anyone explain me when serena is saying : Grandma ! What's wrong ! its out!! its out!!!
what does "its out " mean ?

9 mins after upload .

Why did he crushed the flower ? can anyone explain please ?