My gf and I are open about our sex life and let me friend join in (m26)

We have always been open with our sex live around our friends, there is one in particular who likes to always ask question and you can tell is interested in her. My gf is 5’5 with some big 36DD and a big ass with wide hips. We can tell my friend has a crush on her as he gets shy around her what doesn’t usually happen and when she’s around he can’t stop staring at her. Last night he came round our apartment, she was just wearing a loosely fitting white tank shirt without a bra and very short booty shorts with her ass cheeks coming out the bottom. We were all talking about sex and I was saying how good her bj were, my friend very shyly said he has never had a bj before, he has only had one sexual partner. After a while we had some drinks and the confidence grow and me and my gf were getting in the mood. He wouldn’t stop brining up he hasn’t had a blowjob so my gf whispered to me if it was alright to suck his dick. We have done threesome and stuff before with my best mate so it wasn’t anything new. I agreed and she sighed and rolled her eyes like she didn’t wanna do it and said fine I’ll quickly suck your dick. She got on her knees and told him to take his dick out and he quickly did it. He was already erect so she started to slowly lick up and down and than put the whole thing in her mouth. He cummed very quickly and it all went over her tits and bottom of her mouth. She giggled and said someone really enjoyed that. I than took my dick out and she sucked me off, she took her shirt off taking her tits out and gave me a sloppy bj. I came over her face and tits after a while. She squeezed them to together and asked us to take a picture so we can remember the moment so we did.