If you use the Google Voice Search, you will be happy to know that you can now easily call people based on their relationship to you. For example, if you want to call your wife, you can simply say, “Okay Google, call my wife.” It will work with texting too. You're probably wondering how on earth Google knows who your wife is?
Well they don't, you have to set each relationship with the appropriate contact. Just say the command and you will be prompted to opt into the program if it's your first time. Then say it one more time, and if none of your contacts are registered with that relationship, Google will ask you to select a contact.
This isn't limited to spouses or parents. It will work for a girlfriend, boyfriend, brother, sister, grandmother, and grandfather. You can even choose someone for “my honey.” It's pretty slick, give it a try.
source: +Google
This is pretty cool and something I’ll probably use regularly, but I had to comment on the web result that showed up with “Call my wife”. It literally made me laugh out loud that that video is the top result for that search.