She hatched him. She raised him. When Twilight invites her parents to the castle on Mother's Day, she expects to please her mother, and give her a thanks for all she's done. And little does she know... she deserves one too.
I never really liked the episode Stare Master. After I saw it, I always wondered what Spike was doing when Twilight turned to stone, almost kind of hard to watch. Well here's my take on it.
Sometimes, we are not as strong as we believe ourselves to be. Some things may better remain shrouded by night, where others should be revealed regardless of time.
It takes place after Twilight forgives Trixie for what she did in the episode "Magic Duel", and Spike doesn't buy it. Twilight learns from her friends how Spike really feels for her and now she has to fix it.
After going through so much, it's nice to have some quiet times. But quiet does not mean uneventful. Even in times of peace, ponies change, ponies grow, and ponies learn...
Twilight has a minor complaint. So she decides to phone the company responsible, thinking it'll be a relatively easy process... you can tell she's never done this sort of thing before.