When your day home open for children, you meant to be working not socializing. I do think it a big deal to have people call in but an unknown male, would be concern to lot of parent. Those who have spouse, normally have police check for client for spouse, and those client aware of that situation when they decide to come.

This completely avoidable especially since he calling in for short period of time. It show it not urgent and can wait until end of business day. Would be same for most employees - they not able have someone they date pop in and out of work location in work hours.