After my brother's rebirth, he wants to control

Xiao Nan suddenly understood why grandma has been against them sleeping together!

And it's not just my own reasons, the brothers of the Nan family seem to be very persistent in sleeping together, even if grandma locks his room with the key at night while he is sleeping, the second brother can still get the key to enter the door, Every day, I fight with grandma in various ways, such as changing the single bed, letting Nan Xiaonan sleep in a different room, grandma really does everything to separate them, but it doesn't work.