What to do I've been falsely accused...! :(?

Ok, I'll make this as quick as. Last month I was out with my friend for her birthday. Nothing too fancy just a trip to the local. Get there, my brother in law and a group of mutual friends of his and my other half's are in there. (Other half and brother in law have known them since they were kids)

Part way through the night, we all start talking to one another, at the bar. at midnight, the publican locks doors and turns off front lights as is usual for him to do so we can go on drinking etc.

Talking to one of other halfs "friends" he says, "your other half said I could borrow some of his DVD's to watch as work is really quiet and boring most of the night and I've got a portable DVD player. Can I give you a call tomorrow to come and get them please?" I said ok but land line is broken, you'll need to take my mobile number. I've already got yours on here, i'll drop call you. You can just ring me in the morning or something and maybe you or your wife can come up?"

He said ok, I drop call him so he has my number. There was NOTHING in it, he's my OH's friend. Besides, he's a mutt. Anywho, I drop called him at 1:45am as I was on my way out of the pub with my friend (who had heard every single word of that conversation.)

Next day, I get a silent phone call from a withheld number. I just ignore it, and forget it. A week later, my friends' little boy had his birthday party and OH's friends' wife is there. She blanks me and gives me dirty looks all afternoon. I took no notice, thought maybe she was just being her usual moody nmiserable self. (She's EXTREMELY two faced.)

Then, a couple of days after that I get told by my best friend that this woman had rung her screaming down the phone that she was going "beat the f**k out of that dirty little sl*g next time I see her whether she's got her son with her or not" because I had drop called her husband at nearly 2am. Silly cow thinks I've had it away with her husband. Grim.

She told my best friend to say nothing, but every time I see her now, she either looks at the floor, or if we're with loads of people she gives me filthy looks or even better turns her back on me and tries to cut me out of conversation. It's getting on my nerves but she thinks I don't know what her problem is. I'm dying to confront her but I've been told by everyone it's not worth it. What would you do?