I can see how it would be easy to overlook if someone has the correct skills. Several years ago my supervisor at the time was hiring a person to be in an entry-level job. This person claimed similar classes to my HS experience on her resume (basic computer skills, word processing and spreadsheet stuff). I had a few higher qualifications, but my supervisor felt that this person--who would be working alongside and slightly below me--had adequate knowledge for beginning the job.
This girl asked me everything. From "How do you calculate a total in Excel [spreadsheet]?" to "How do you update a quote [in a form designed on Microsoft Word--only the form price needed changed]"? One day I gave her a crash course in the goodies of Excel spreadsheets, and the wonderful things the buttons could do for us. "How did you learn all this?" she asked me.
"In XYZ class in high school."
"Oh, that's my problem," she giggled, "I was always skipping that class to get high."
My supervisor overheard and Was Not Amused. She also was not kind about cutting the girl loose a week or so later, when her work did not rise to the afternoon of training I had given her. OP, if your new hire lied or misrepresented herself and her experience, I think you do not need to be "kind" per se, but simply acknowledge the fact you understood she had XYZ skills and since she does not, you need to find someone who does.