2 sources of germs from boy and girl.

I'm sick, all thanks to the 2 sources of germs in paternal Ah Ma house. The one in the red circle is one of them. *Sigh* Mummy said, some people just don't understand simple chinese. Ah Ma has already told the other Ah Ma that if any of the 2 kids are sick and are in her house, pls pls pls inform Mummy beforehand so that she can make other arrangments(go on the days that the 2 sick kids are not around or don't go during that week). However, it seems that paternal Ah Ma don't understand it and keep quiet about the 2 sick kids! One moment she said she didn't know the kids were sick, the other moment she said the cough and running nose were on and off. Umm.. don't you think it sounds contradicting? If you don't know they were sick then how come you know it's on and off? *scratch head*