Just because your experience is with your mom, doesn't mean it is not a good one. List those hours on your application and talk about them in your interview.
The LOR on the other hand: Most schools state in their supplemental applications and on their website that LOR from family members are not accepted, "letter of recommendation from a DO other than a family member".
Don?t discredit your experiences, those are great, just have a friend of the family write the letter and it does not hurt if he/she is an alumni of the school to which you are applying.