Or she could be trying to call him... I didn't think of that situation, but she'd probably call me to tell me Mark is missing, because she'd likely call him right after I called her about the meeting. That gives him a couple hours to eventually respond or call back. So, at this point, if he didn't return any calls, April probably would have been worried and probably would have called me to tell me that Mark wasn't returning any calls or texts for over two hours... on a Sunday.