My ex hubby has requested for more days with our daughter. She goes stays over with him one night a week. I am not comfortable with that. Can I say no? What happens if he insists?

How old is your daughter? I would feel unsafe too. Continue to teach her about no body secrets, etc. Until she is able to understand more about those or able to tell u about her stay with daddy, u may consider to allow longer stays. I am always on about trusting our mother instincts.