You are welcome to answer questions posted in the Ask a Teacher forum as long as your suggestions, help, and advice reflect a good understanding of the English language. If you are not a teacher, you will need to state that clearly at the top of your post. Please note, all posts are moderated by our in-house language experts, so make sure your suggestions, help, and advice house the kind of information an international language teacher would offer. If not, and your posts do not contribute to the topic in a positive way, they will be subject to deletion.
For example:
You're getting pretty
or
You're becoming more beautiful.
This may not help you, but when I was being taught English, we were discouraged from using "Get", and did exercises replacing it with appropriate verbs.
In your example I would change the second one to
You are becoming prettier or You are growing prettier
Become/get 
Linear Mode
