This may not be relevant but do you really think 13 year olds should be getting into relationships at this age?
The hormones are crazy at this age so unless you don’t mind them experimenting sexually then maybe it’s not a good idea?
What happens if she gets pregnant are they really ready to have a family? Of course not at 13.
You may be thinking they won’t be doing anything like that but here is my point. The hormones are crazy and will bring frustration