I agree w/all who posted, especially what DnJ posted. She's baiting you and wants to reel you back in. Don't discuss your personal life w/her...it is none of her business and as for a ride in your car....nope. She is seeking the thrill of having two men on the hook and she knows that you have moved on. Keep your conversations short and sweet and on the children and customer/visitation issues.
The less you tell her about yourself and what you are doing, the better. She fired you a while ago as her husband. That means she lost out on knowing your personal business.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.