Honestly I hope that she doesn't change her mind given her age. That would involve much higher risks for her and a baby. The only thing I've been looking for is can she admit to the possibility that despite the improbability, something might happen to make her willingly change her mind (even if she wouldn't act upon it) and if such a change did come about would she say "Hey turns out there actually was something I never foresaw that caused me to change my mind"? You, by the way you worded your last sentence leave open the possibility. You also strike me as one who would say later, yes you are indeed changing your mind on the matter.