I see..
For me, I'd value my Mum's tears more, because she is less likely
to shed tears. Something serious must have happened and if was
caused by me, I'd feel very guilty, unless they are tears of joy.
The act of letting the most important and loved woman in your life
down is plain criminal.
As for girlfriend, it's most likely because I did something stupid.
Apologise and coax her lor. The reason is definitely important, so
that I know what not to do in future, or how to console her if it
wasn't my fault. 
