My sister just found out she will be having twins! Currently Grandma is trying to decide if she will need to purchase a new vehicle since she babysits a few days a week. It is possible to have 3 across in a 2008 Lexus RX350? She will need 2 infant carriers and 1 FF seat. Currently the seats we have to choose from are 2- Britax Companions for the infants, and a MA, RA, or BLVD for the FF. She is open to purchasing new seats/ extra bases vs. a new car! Any suggestions or experiences you can share would be appreciated.