You said you texted her- I would (and have) let texting go way before I would my internet go,lol. Everyone has different necessities I guess
There is a phenomenon called The Digital Divide: the knowledge gap between those who have ready access to the Internet and those who don't. It was first studied about 17 years ago, and it stayed pretty broad for a very long time based on both age and SES. However, about two years ago the gap based on income started to narrow at an unprecedented rate, and now it is on the verge of disappearing in the U.S. Why? Smartphones.
Younger poor people will move heaven and earth to afford wireless phones, and most of the time smart phone accounts, especially prepaid accounts, will have texting included in the cost. However, VERY few people in this demographic have home computers, and those they do have very seldom are connected to the web. The interesting part is why the difference exists, since a cell phone data plan usually costs a bit more than comparable-speed home internet, and also usually gets less data.
The reason is that a cell phone is portable, and people on the street can see you use a cell phone. Having the "right" mobile phone is a portable status symbol, and portable status symbols are usually very important to younger people who are poor. The last number that I saw was that mobile web access penetration has reached 88% among low-income adults under age 35. (Not all of this is smartphones; the majority is actually so-called "quick messaging" phones, but most of those can access the web in a limited way.)
The majority of older people (those over age 70) still tend to be way behind in digital terms, but that gap will naturally close as time goes on. At this point most of them do understand how to operate a computer, but many of them left the workforce before the Internet became ubiquitous.
BTW, I was the victim of an identity theft 3 years ago; our HR records at work were hacked. The ring got about 50 of us, and in every case the type of fraud was the same: they opened multiple cell phone accounts in our names. The police explained the scam this way: they open accounts and then sell the phones on the black market as prepaid, telling the buyers that they are disposable; that when they stop working you just throw them away, but that they are good for unlimited use for 4 months. (That's how long the company routinely let the accounts go unpaid before they shut them down.) The thieves usually sold these phones for about $75 each. In my case the usual bill that was run up on each phone before the account was shut down was about $2-4K. This type of fraud is going away now except in immigrant communities, because now you can legitimately get a prepaid smartphone with unlimited data for $25/mo.