If you want to share a home number with your spouse, roommate or family member or work number with a colleague, both of you can add the same home or work number to Google Voice.
1. Sign in to the Google Voice website.
2. Click the gear icon at the top of the page, click Settings, and select the Phones tab.
3. Click the Add a new number link and enter your phone information in the appropriate field. Make sure that if you’re sharing a home or work number with another Google Voice user, you select Work or Home from the Phone Type drop-down menu.
4. Click Save.
Note: You can share a home or work number across two Google Voice numbers, but you can’t share a mobile number.