My husband called me by another chicks name...?

Okay, so me and my husband are laying in bed, just chilling, watching tv, talking, and I made a comment about some politics on the tv and he went like he was gonna say, "Erica, that's ridiculous"...but he said "Ashley, that's ridiculous." He realized what he did, and to make it weirder, he tried claiming that he did it on purpose to make me think something. We've been together for 4 years, married for 1 and a half and he don't really stay out late or go clubbing or any of that crap, but he works kinda far away. What would you think? What do you think?