<human>: Can you provide a brief rundown of the text in within 3 sentences?

So my wife is a teacher at a charter school.  The people are nice, but they pay well below what the public schools pay.  Right now, she earns less than what she did when she was serving.  She started working there last April.  She she was hired, the principal told her that since she was taking over the contract for another teacher who quit, that the contract was non-negotiable because the budget for that school year was already set.  However, he did say that there would be "much more flexibility" next year.

So at the end of last school year, the principal waits until the last day to hand out the new contracts.  My wife's contract doesn't show any increase to her salary and the school year was extended to start Aug. 13 and not end until June 28.  Without having any other options, she agreed to it and told the principal that she was committed to the school and was excited about the new year.  She also asked about the raise and he just simply said he couldn't do it.  She also talks to a couple other teachers who have been there for a long time.  Some of them haven't gotten any raises in over 10 years.

Flash forward to two weeks ago.  The principal calls a few days before school starts and says that he was able to get a $400 raise (for the whole year).  She's been looking for other options all summer, but hasn't found anything.

Now tonight she gets a call from a school where she worked for the after school program awhile ago.  They have a position open and want to interview.  It sounds like she is the only one being interviewed.  The new position has a normal length school year and pays about 20% more.  It's also about 10 minutes closer for the commute.

Is it wrong for her to pursue this?  Obviously it is a great opportunity, she just feels bad about leaving the first school.
<bot>: Wife's current school doesn't pay well and doesnt seem to have a future. She accepted a contract there for this year. Got a job interview at a much better place.  Is this ok?