The brother and sister

I tried to seperate both of you, as afraid Kelvin may pass some of the viruses to Kaitlyn, but both of them can't be seperated. As soon as both of them see each others, they want to play with one another, especially if both of them in the room. Kelvin will jump on the bed and Kaitlyn will clap her hand or shout and want us to hold her and let her jump as well.

Then...how to seperate both of you.....