You should send a "wrong number pic" to her and see what she does.
Replies 2

That's what I'm thinking. Should I act like an accident or wait for her to say something about it. And if she doesn't then what

I think you should send it and wait till she responds before apologies. make sure there is a name in your phone close to her name, like her name: Mom fake name: Moni. If she doesn't respond go to her and act like nothing happened and lightly flirt to see a reaction. If she is outraged either after sext or you going to her room then apologies deeply and say that you are very sorry.