Manage Family Sharing without iPhone or iPad or Mac

Hello patelhiranya,

It appears you cannot:

Set up Family Sharing - https://support.apple.com/HT201088

• "To use Family Sharing, you need an Apple ID signed in to iCloud on an iPhone, iPad, or iPod touch with iOS 8 or later, or Mac with OS X Yosemite or later."

You can get shared material with a PC with iCloud for Windows but apparently you need to have an Apple device to set it up.

It can be done using one device, but it is a bit more difficult using only one device. On the device, sign into iCloud with your Apple ID and set up Family Sharing. If necessary, create the child's ID. Sign out of your ID and sign in with the child's ID. Swap iCloud sign in as required.

Your wife could be the Organizer for Family Sharing and the child a member of the Family Sharing group with Ask to Buy set on the account.