To all the people who are suggesting that the mother thinks MILF means something else: she’s commenting on her son joining a fan page; I’m pretty sure she’d be able to figure out what it means from the link.
I have to say, part of the lameness of the whole debacle is that there is a group (actually several) dedicated to MILFs in the first place. This particular one has a picture of Lois from the Family Guy as its avatar. This ranks up there with the “What sex toy are you?” quizzes, IMHO.
Reminds me of a few years ago, when I was in high school and Bebo was the height of internet communication. There was a sudden increase in the number of 16 year olds getting pregnant and joining groups such as “MILFs unite” and “Pregnant is the new Sexy.”
The vast majority of them were right mingas; give me Stifler’s mom anyday!