With the DUP, she has a working majority of 2. She's going to have a rough time governing on that. I stand by my earlier prediction of another election inside a year. She'll struggle on for a few months but every time she wants to get legislation passed she'll need to please literally everyone in the Conservatives + DUP. Eventually, her party will have had enough of her and she'll be forced out or resign, and then the next Tory leader (BoJo?) will call another election and maybe take that one a bit more seriously.
I also hope someone's going to pour some cold water over Labour triumphalism soon. I don't know if anyone noticed, but Corbyn just lost. Lost to the Conservatives running perhaps the most incompetent campaign in living memory.