He comes in my ASS - POV

My best girlfriend's boyfriend spent the night at my place again and this time I surprised him while he was sleeping. I really just wanted to get back at him and use the video evidence at the next party, but he woke up during my handjob and didn't wait long to pull me onto the bed with him and tackle my firm ass. He loves to fuck me doggy really hard and then, defenceless as he made me, wanted to fuck me really hard anal - instead he just spilled a clearly large portion of cum in my asshole - my ass is probably too horny for him, he couldn't hold out any longer.

How long would you have lasted?