David Arquette apologized on Twitter after mouthing off about his miserable marriage to Courteney Cox. Arquette said he hadn’t had sex with his estranged wife in four months and believed Cox was tired of acting as his “mother.” After getting what was speculated to be a furious response from Cox, he posted, “I went on Howard Stern yesterday to provide clarity and honesty about what I’m experiencing but . . . shared too much . . . It’s alright for me to be honest about my own feelings but . . . some of the information I provided involved others and for that I am sorry and humbled.”