Since she was 100 km away, it didn't make sense she was going to be there in 15 minutes by normal means, so it meant either she was lying or OP was actually going to be teleported. OP apparently chose to believe the latter, since it confirmed their current delusion.
So it didn't postpone anything, maybe if she had given a realistic ETA (or just said "I'm coming, wait for me") it would have worked though.
It's very difficult to know what to do in these situations though, I've been on the side of that girlfriend and you just can't have a full understand of what's going on in the head of the other person, everything is just walking on eggs, except the eggs are actually landmines.
So it didn't postpone anything, maybe if she had given a realistic ETA (or just said "I'm coming, wait for me") it would have worked though.
It's very difficult to know what to do in these situations though, I've been on the side of that girlfriend and you just can't have a full understand of what's going on in the head of the other person, everything is just walking on eggs, except the eggs are actually landmines.