I need your help!!

The movie plot-

A teen who is either in foster care or adopted, goes and finds their biological father who had no clue about them,  who has dated so many women, that they are unable to tell them who their mother is or doesn’t remember anything about her. The teen and their father go on the road with a guy with a Cadillac looking for the mother. They eventually find the teens mom who has many kids and is willing to take the teen in. The father is engaged to be married to another woman. The movie ends with the father’s wedding, the biological mother, the teen amd the man in the Cadillac are all there.

I don’t think the was a big movie, perhaps Independent or straight to dvd type.