I don't trust her to stay by herself

Originally an old friend and me were going to relax this weekend. I am petsitting and invited her to dinner. Well I have to work all Sunday and Monday I work the new job then the seasonal basically 10am - 11pm. She doesn't drive so I would have to drive her. She lives in the town close to my seasonal job but I won't be coming back after todays shift until tomorrow afternoon. She would have to stay at the petsitting house until then while I'm at work. I don't trust her with the dogs. She would take them for a walk or let them out without watching them. The one is very strong and will try to fight other dogs walking by. Plus, while walking the poodle. I barely can hang onto them, she supposeable has neck problems. Even if I told her not too she will, she's done it in the past while petsitting for a lady we both work with. So I don't her I had to work, and we can go for lunch today and coffee but I don't know when ill be done so its best if we don't plan for her to come over. I just think for my own sake not to go through the stress of her at the petsitting house and the safety of the dogs.