Parents rules basically are older sister must be at least dating before any suitors can approach Ana. That whole “older sibling must be wed” syndrome except they’d at least like to see progress for Airi and... finding out there was no progress from her they either assumed that she and Guy had been seeing each other in secret OR they just assumed ‘hey this guy professed his love and with Airi engaged we can help Ana find a match!’ 

The whole parents being helpful but not being helpful. 
-laughs-