Send them like normal and she will recieve them, but you may have to pay international texting fees (which is like 25 cents per). You can find out more on VZW's website under International Services.
Hello omarreyes! The cost for texting from Mexico is .20 cents. The specific page to veryify this is below. I hope this helps
I don't see texting specifically but it does include Mobile Web so you could e-mail. You might want to call Verizon and ask about the Mexico plan for one month. They may be able to include texting, but like I said you do have emailing as well under Mobile Web