That's a nice case from a dental point of view, but depends of what the patient wants.
It can be done extremely conservative.
If she wants only to close the diastema, immediate results, low expenses, than I would do direct bonding or "no prep" veneers (…with a question mark…). Patient most likely has interference on 2.1 and from the picture, she seems to have already some composite there. Depends on the occlusion in dynamic, models, clinically and decide with her.
Cristian Parascan , DMD, CDT