She clearly needs to consult her tax attorney.

You are mixing and mingling two entirely separate issues.

Whatever it is that your wife is paid for her "styling" is income. Whether she is paid in cash and whether you deposit the money to a bank or sew it into matresses has nothing to do with anything.

In addition, if you are making regular significant cash deposits, whether they exceed $10K or not, they may still be suspicious and whether you complete a CTR for the deposit, the bank may well file a Suspicious Activity Report (SAR) with FinCEN which will wend its way to the IRS and other agencies and then possibly to an audit of how you come to have those sums.

So, back to step one. Have her see her tax lawyer.