Can't Stop Thinking About Them.

So when I have sex with my gf right before i cum I always picture me fucking her best friend. I found her nudes one day online and have jacked off dozens of times to them. I've been trying to give hints about a 3some cause I'd do anything to fuck her friend. She's 5 5, c cups, blonde, super bubbly likes anal and a perfect tiny innie pussy...