What does a girlfriend do when she walks in on you and your mate?

Sam and Mona are both good friends of mine, they're a couple. Sam knew Mona was keen on a threesome with two guys and also attracted to me. However Sam hadn't told her that me and him had started meeting in secret and were experimenting with our sexuality. Luckily when she walked in on us this day she wasn't mad... quite the opposite. At first she was surprised but then started giggling. In 2 minutes she had her most of clothes off and was jumping in the bed with us.
Mona watched us for a while and then while we were busy kissing she just started to wank me. I was pretty sensitive at that stage because Sam had already been sucking me off so it felt great in her gentle hands.

It wasn't long before Mona was licking my cock, flicking it with her tongue and sucking the head like an icecream. Sam joined in and they were both licking my dick, one down each side and kissing each as well. They were fighting over my penis with their tongues and mouths. I was in a frenzy. Mona got up after a while and stood over me to take off her panties, then squatted over my face. I licked her dripping wet pussy while Sam kept up at my cock. ...Dan

Also bi-curious: I'll take 3 to go