Most often it gets passed out in stools
Thanks for the query
If she has swallowed the coin and after that she is breathing well and having a good appetite then it is nothing to worry about, the quarter will get passed out in stools eventually.
Foreign body posses a risk only if it gets stuck in the food pipe or throat.
Here are my suggestions to you
1. Seek immediate help if she complains of pain abdomen or vomiting
2. Ask her to look out for the quarter in her stools ( most likely it has already passed out since it been 5 days)
3. Possibilities of pain during defecation can occur when she is trying to pass stools which might have the coin in it.
4. Ask her to watch out for bleeding while passing motion
I hope I was of help, if you have any further queries please get back to me