I have been giving my daughter these smoothies that make her fatter secretly.
Why try to faten her up?
I just want her to grow up and look nice.
This is unhealthy and border on child abuse in my view. You are putting your kid down a terrible path with her health.
What? She's just starting her life, I'm giving her a better future. It will be a help to her.
If she normally under eats then it may be good for you to add calories to her smoothies, however this is still a dishonest way to go about it. If you feel like your daughter is putting her life at risk then this is really the only reason why you should be fattening up her smoothies.