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.
I was always living in his shadow, she said. You Are The Sunshine Of My Life finds wonder expressing his devotion to Syreeta-it's a husband looking upon his now-familiar wife and remembering why he loves her and always will. It didn't work out for this couple, but the sentiment was irrefutable. The song remains a heartfelt expression of undying love.