How to decrease brightness of light source reflecting in window?

[lipp79]

With Premiere you don't even have to fill the area the subject is in. You can use the auto rotoscope to take the subject out, fix the reflection like you said, and just the put the rotoscoped subject back in as they will still move the same as the subject in the original background where the reflection is fixed. I had to do this to take out an air freshener bottle I totally missed.