Your mom is having her needs met by your fraternity. They tell you all about it while they paddle you the day after she leaves from her long weekends visits. They even invited her to move in full time to be their house Slut.
It was previously difficult for me to find a woman willing to keep my cock locked up & not use it for extended periods. I guess this is why they say "be careful what you wish for" but I couldn't feel luckier to have found her.