Our pup (only had her a month) only listens to me 
Then when DH or the teens look after her, they have discovered she WILL come, but only if they speak in a high pitched voice , mimicking my (foreign) accent
It’s hilarious, but essentially I think it is because I train her 2x5 minutes a day with name + command (eg: “Chubby! Come!”, “Chubby! Sit!” Or “Chubby! Leave it!” That’s as far as I got), rest of family not bothered with any “formal” training
2x5 mins is very little, I guess I may need to do more?
Yesterday the little bugger escaped, and I found her practising stairs. She struggles as she is a very large breed with huge paws/legs but she keeps escaping to try and master the stairs. She’s determined. She also spent half an hour trying to teach herself opening door handles
Bit worried she is much more clever than our old docile dog 