Becoming a mother definetely a big thing.
You have to love, feed, take care of your children, even when they are cranky and tired, and not at their very best self. Do you remember many sleepless night, days of cooking and doing house work, and some of us still have to go to work. And do you remember when going out with friends and social life at times already become a myth.
However, when you see their smile, everything become worthwhile. Even when it is sort of "forced" smile.
I hope you enjoy being a mother. Happy mother's day!