Im i a jerk!

Ive been taking care of my friends son for 3 months. They drop him off at 6:30 am. He sleeps till 7:30am i feed him and drop him off at school after i drop of my daughter. Then afterschool i pick him up and they pick him up at my house. I do not charge her to babysit or the food he eats at my house. Its been 3 weeks she doesnt talk to me because i told her we dont celebrate halloween. Her sister drops him off at my house and her brother law picks him up. I sent a message with her sister and told her please have her call me to find out what is wrong. Its been a week she hasnt called me. Im still taking care if her son. I dont think my belief should interfere with our friendship. I respect her belief and never preach the opposite of what she believed in. Now im still caring for her son for free. Please advise. Ty