Picnic blow job

I like kinky and outdoor sex and love the fact that my boyfriend plays along with my sexual fetishes although he's shy and submissive, I know he likes it because his dick gets hard and cum's easily.
I once went on a picnic with him and my girlfriend. We found a secluded spot and she and I were talking about sex on purpose and I saw he got really hard so I told her to give him a blowjob while I watched
He didn't know that my girlfriend and I had been talking about it for months till this day we sprung it on him. We were both wearing mini skirts so I pulled mine up and my thong to one side and fingered my pussy so he could watch. As she blew him I lifted her skirt and was rubbing her pussy and gave myself and her a mind blowing orgasm. He thought all his birthdays came at once.
Afterwards I told him I didn't have a problem sharing him with my girlfriend and we now have threesomes often. I love laying him on the floor riding his dick while watching my girlfriend sitting on his face and then we swap. I guess all three of us are sluts but it's a great way to spice up sex.