My husband does not believe that our Mazda Protege could do 3 across if we needed. We currently have a true fit and a nautilus. I am not pregnant and don't plan to be a for awhile. I am just curious if it could be done with an a safeseat/snugride32. DS is 4.5, 46.5#, 43.5" and DD is 9 months, 17.5#, 28.5".