Have you ever met a dog who is TOO affectionate non stop?

I am an animal person. I own and love animals but right now, I’m dog sitting my mom in laws dog (small medium size, idk the breed) and I can’t get away from her even for a moment. Honestly it’s really bad. The dog is literally on my heels no matter where i go or how far and usually it’s not far like even to move from chair to couch. She’s used to visitors and used to not being around her main owner but she literally puts her nose in my face if I’m not directly interacting with her ALL the time. I also have a cat of my own who I’d also like to attend to and there’s just no way I can. I also have computer work to do but unless the dog is joined to my hip I guess I won’t be able to set some time alone for that.

Wtf causes this kind of behaviour?! It’s annoying af! Even to close the door and be away she will scratch the door and whine till you open it.