Thanks everybody for all of the input. I meant to put in my original message that my front passenger airbag automatically disables if there is less than 100 pounds in the front seat. But, I couldn't agree more on how dangerous it would be for an airbag to deploy if they were in the passenger seat!! I'm definitely adding an extension to create another attachment for the second harness. I just have to decide on which size seat still. I want them to have enough room to be comfy... even though they typically lay right on top of each other even when they have the choice to lay anywhere in the entire house
