Tourist visa expiring - but I want to stay a few more days!

Hi everyone,

My tourist visa is expiring the day after tomorrow, at which time I have booked a flight out

However a family member now wants to visit and requested I stay a few more days with them, which means if I decide to overstay it will be 4 days

I have looked online and found this link which says I'm due to pay a minor fine but otherwise will be in the clear. However I cannot find any sources from the Turkish government online or here to confirm this.

Will staying a few more days adversely affect my ability to come here for tourism in the future? I often come to turkey but never for this long. I am concerned I will not be granted tourist visas in the future, or perhaps I may be banned!