A story if I were to write it?

I don't have a full storyline and I probably only have the beginning part done, but I don't know if I want to carry through with it since it's relatively wierd and might be cliche since a girl gets jealous because of a relationship but, uh, lemme just tell you the gist

So basically it's about a girl named Elizabeth who is the older sister and a princess of Arlin along with her sister Lily. She's is in a relationship with the next heir of Mata named James and against popular belief, their relationship wasn't arranged. They're pretty much the stereotypical perfect relationship- you would never ever see them apart. Ever. Anyways, Elizabeth is very bossy and has slight anger issues, but it rarely shows. She follows close to the law when it benefits her but if it does anything to her status and makes her seem "less cool" then out the window the law goes.

Unfortunately, because of her bossiness, she jeopardized her relationship with James by threatening his 7 year old sister Sarah (although she didn't know who she was at the time) to make her a goddamn sandwich. James saw Elizabeth in the middle of doing so and he could finally see how far Elizaveth would have been willing to go to get what she wanted with the commoners.

More things go down after that but if I told you, it wouldn't be as fun

Tell me what you think- should I write it into an actual story?

Also, names are temporary (ish) since I might change some if my friends' names