Answering the original question, I'd say yes, just barely, but yes. Almost 2 hours is enough time, imo... but if she is a worrier, I'd say get more. I don't fly THAT much ( just about 15 round trips per year) , so I'm still at that point where I actually **like** (gasp) staying at the airport hehe, I find them fun!

Not related to the question, remember that for International to International, passing through DFW is great. You dont have to worry about your bags as they are checked to their final destination.