Ember app separate route inside iframe

In my Ember app, say I want the following implementation;

On Step 1, the route is defined as

my-app\step1

Now when I transition to my-app\step2, I want to show an iframe which would re-direct user to some other app & then when user comes back, I want the re-direct back to happen to

my-app\step2Done

But I want

my-app\step2Done

to only affect the iframe (So main address bar URL would still say

my-app\step2

, but iframe would load data based on step2Done route)

Is this possible ?