This will depend on whether or not the other who has hurt you shows what I call in my book, The Forgiving Life, the “three R’s.” Does this person show remorse (or inner sorrow), repentance (coming to you with a sincere apology), and recompense (trying to make it right, within reason)? If the three R’s are in place, then you can begin to try to re-establish trust, which can be earned one small step at a time. See if the person can handle the particular kind of responsibility that did not materialize in the past. If, in the small steps, the person shows a good will and sound behavior, then you might trust in more substantial ways. If the person cannot handle finances, but you give the person now a small responsibility with finances and this is handled well, you might consider a little more financial responsibility, and then a little more. Trust needs to be earned and is often built up slowly.
For additional information, see The Forgiving Life.