I have now had to allow my mother to see DD. I stopped contact due to lots of reasons and problems, basically down to her undermining me as a parent and telling DD things about me such as how I'm lazy, don't do anything with or for DD, that DD should ignore me, etc. She also thought she was the "second parent" because I split up with DD's father over 8 years ago.
The reason I've allowed her to see DD is because it came down to courts and lots of extra stress that I couldn't handle. I don't want her coming to see DD. I don't want her to have any contact with her. But the chances are if I stop her, courts will allow her access. So least this way, I have the upperhand and call the shots. So at the moment, she comes to us once a month for an hour.
But how do I explain to DD how she isn't able to go to grandma's? I don't want her to go there as I don't trust my mum to have her. Least here, she's right under my nose and I know what is being said.