The approach you are taking is not worth it for you simply because:
USB debugging needs to be enabled beforehand for using any adb command on a device. Since your mother probably would have never felt (and why would she anyway?) the need to enable it, assume it to be disabled.
Since debugging can only be enabled either manually by the user under Settings ...
It seems that OP got an answer from Xda-developers for Microwear H5.
You can enter recovery mode via adb command or installing a reboot to recovery app from play store.
The adb command is the usual one for rebooting to recovery:
adb reboot recovery
The answer also applies for Kingwear KW98.