Is this a trigger for IRS?

My visiting GF from another country has been working in the US, she was getting paid in cash.  The cash she made,  she gave it to me so I can deposit it in my bank account so that I can wire transfer it to her bank account in another country.  Am i doing something wrong?

I've made 4 wire transfers totaling 8K.  My concern is that this is a trigger for the IRS.  Is it???