What is each child's actual weight & height?
What specifically are the current carseats you own?
I have fit 3 seats across in a 2005 Camry. The Scenera does fit newborns better than most
convertibles because its bottom harness slots are very low & it puzzled reasonably well both
rear-facing &
forward-facing on the passenger side with
Graco Ultra or Platinum
CarGo center +
Chicco Keyfit on the driver side. The
Sunshine Kids Radian is quite narrow, also fits newborns well & keeps kids harnessed longer than the Scenera, but costs more. The
Britax Parkway is generally the easiest
booster to fit in such tight squeezes.
Remember that each carseat must be
independently secure: meaning, each seat must not be able to move more than 1" in any direction
at the LATCH or seatbelt path without relying on pressure from nearby seats.... Acheiving correct install with 3 carseats is usually quite difficult because the seats press up against eachother giving a FALSE sense of security. I install the center seat 1st before installing the outboard seats (next to the doors), then I *uninstall* the center seat to make sure both outboard seats are in correctly. Somestimes I then have to start all over from the beginning to make sure they're all back in correctly (reinstalling the center seat while the outboard seats are already in place often gives me bloody knuckles). It would be best for you to visit a local CPST once your baby is born, just to make sure each child is as safe as can be
Congratulation & good luck!