Boring Matthew Broderick Cheats on Horseface

Sarah often brags about her perfect marriage, and has publicly wondered if her husband is gay
While Sarah Jessica, (who is often mistaken for a horse)

was frantically searching for corny, boring Matthew Broderick

one night earlier this year, he was having sex with a gorgeous redhead half his age, the young woman told a friend. After meeting in a bar, Matthew began text messaging the 25-year-old youth counselor, says the woman's pal.

Soon after, the insider claims, they began seeing each other and things got passionate quickly when they met at the Manhattan townhouse of a "showbiz friend."