Contrived? Suuuuure. Trump planned 11 years ago to hand write a letter to this woman he likely knew through the pageant process and waited all this time to benefit from her misery.
Lame to think that way.
There are plenty of examples of Trump's generosity that have been brought up that he doesn't even talk about.
I agree with most of what you said. Let me put it another way: it was not spontaneous, it was pre-planned. I presume her tale is true, just looking at the details.