Her parents' attitude only 'confirmed' [='strengthened, reinforced'] her resolve to get her own apartment.
We have a reservation for you for tomorrow night. Please call to 'confirm'.
The dentist's office called to 'confirm' your appointment for tomorrow.
(..) The wife and I are celebrating another anniversary. Got my kid's game this weekend. Family reunion. The whole family's coming. Oh. Just wanted to confirm. That you were all busy. I assumed you were all busy and you are. So, if anything changes, let me know. I maybe could get out of work. (..)2016 Storks