Can i be arrest if police report is made

My situation is I take care of elderly women and there cameras in house and being watch at all. Per her son we are ask to lie to his mother that has Dementia. To get her to try get her to do stuffs like drinking water . I ask the lady to drink water before leaving to activity. And we are ask to lie to her so she well do simple stuff so I told her Elizabeth said take this which was water. Now . The son said I was giving her pills that were in her hand but I didn’t give any bills if she had some in hand I didn’t notice. So now accusing and threatening me that he is putting police report. So they can arrest me. And he told call care.com and reported it. So they cancel my accounted without knowing if true statement and my other clients got letter for alert I was so discussed. What are my options. I can be arrested with son placing a police report. And do I need attorney ASAP or just wait for police report..