Dad signed up to prime … I bought a fire stick and logged on to prime using his password (he knows about this). Now my sister wants to get a fire stick and also log on with his account.

Are there any restrictions to doing this? How many people in the family can use his account?!

You can only use 2 devices “at the same time”, there is no restriction on the amount of devices.

Tell your dad to be careful – giving Amazon Prime login’s is not the same as a Netflix login.

It gives access to his whole Prime Account – ability to order, payment info, delivery details. She could order films and DVDs through prime.

The only person I share my Prime account with is my wife.

If he gave her a stick that was already logged in he may be fine (but I wouldn’t!).

Understood muffin man .. I raised that concern with him so my sister will be briefed!

You can create an Amazon Household which allows you to share the Prime benefits with another adult and 4 children.

Not tried it myself but there is info here:

https://www.amazon.co.uk/myh/households