same here. we strictly had to speak urdu at home. i also started to speak urdu with my son. this was really hard, bcz the 6 yrs before he came, i only spoke german with my hubby. so it was a huge change.
when son started to go to the kindergarten with 3 he always tried to speak in german with us. he is 5,5yrs now and always forget the urdu words! grrrrrr