You should be able to share the subscription with someone outside the household, but it is not recommended as it is in violation of the EULA. For more information on how to share Office 365 Home Premium, refer to the following link and check if it helps:
You Are the Sunshine of My Life  is a 1973 single released by Stevie Wonder.
The Most Popular Song in the United States. It really is quite understandable why at least one person in almost every American Family knows the song You are my Sunshine, as this song is one of the most commercially programmed songs in the United States.