J.U.
My kids are about 22 months apart, I put the car seat in the car about a month or so before I was due. Yes you will get lots of questions but you are not doing it for them (strangers or distant family). This did prove to be a great visual and get my older one thinking about her soon to be brother. She was a great help and didn't mind not one thing about her brother. Now that they are 5 and 7...still good relationship but they have their days like anyone.