I ended up straightening my niece's hair since she asked me to help her get it straight.
How does your niece feel about her hairstyle?
She's always happy when she is being my friend
It was good of you to help out your niece get the hairstyle that she wanted by straightening her hair. It's important for family members to help out each other when the need arises so that they know that support is always there for them. By helping out your niece with styling her hair you are being a good family member and are showing that you care about her.
Ehhh, she's old enough to straighten her own.
I am sure your niece was happy that you were able to help her out. It is much better for you to guide her to straightening her hair if she is not sure how to do it.