The annual gift tax exclusion is $14,000 in 2017. If you are married and your sons are married you and your spouse could give each couple gifts totally $56,000. Between the two sons (and their spouses) that exceeds your $110,000.
Of course if you're not married and/or your sons are not married you are limited to $14,000 for each gift and would have to report the excess but the estate and gift tax exemption is $5.49 million per individual,so you shouldn't pay any tax.
Tom Young
