Hmmm....what does it mean?

After childbirth, i had taken a long break of 15 mths to get back to work. The reason being I wanted to be with my baby for atleast a year before i get back to work, even now i feel guilty for leaving her at home but complusions of life made me to go to work.

Today I got a mail from one of my friends who just found out that i started to work saying "Very nice to hear that u r keeping urself busy..

"What on earth does that mean? Does it mean I was lazing around at home not doing anything? Or is it that only a working person is busy?
The attitude of the people never change,a Stay at Home mom is always looked down on.