I bought my mom fancy shampoo for Christmas but I ended up using it.
What was the reason you kept the gift for yourself instead of giving it to your mom?
I heard that fancy shampoo is good for the hair.
Instead of using that shampoo, you should have bought two shampoos, so you would still have one for your mother.
You think I don't know that?
This is a mistake that you can overcome. Just buy her the same shampoo again and give it to her.