His mother can't resist her son's cock.

Looks like she's checking his cock to see if he has any kind of STD or something like that

Can somebody translate?

Yes, like I said she's checking for something "red" on his cock, like a std or something. He insists to his mom to check it and she says that she don't see anything wrong, that it's "normal"

The funny thing is that he set a secret camera to record his mother checking his penis. Naughty little pervert lol