the problem with time out

lately is that more often than not she's in time out for not being kind &/or gentle to her brother. his tears from her rough behavior soon become tears of sympathy and distress that his favorite playmate has to go sit in another room. without him. i'm still not sure if he's upset that she's upset or if he's just upset that he can't go sit with her.
see her 'resting' on the time out mat? he bangs on the doors until we let her out. or let him in.
adorable, cute, and annoying...all at the same time.
sigh :)