I'm not sure exactly what kind of 'mom rides son story' you specifically mean. It could be a story about a mom taking her son on a bike ride. For example, the mom might have a bicycle with a special seat for her young son at the back. Every weekend, they go for a ride in the park, enjoying the fresh air and the beautiful scenery together.
Another 'mom rides son story' could be in a more symbolic way. Maybe the mom is driving her son to school every day. This daily ride is not just a simple transportation but also a time for them to talk, share their feelings and thoughts. The mom might use this time to teach her son some important values or give him advice on how to deal with problems at school.