Alessia and I shock our guest!

Alessia was sat on the couch and I was sitting on the soft fur rug between her legs. We were relaxing and recovering watching an old movie. My ass was still feeling hot and wet after Alessia had earlier fucked me hard and long and I had returned the favour to her. But that is another dream!
So back to last night, I was gently licking and sucking her spent cock while we watched the film. She was so relaxed as I pampered her with my mouth. I could feel her stiffen in my mouth and start to moan so I backed off a little as I wanted this session to build up nice and slowly and then work up to an explosive climax when we were both good and ready. After a few minutes I started to gradually increase the pace and the pressure my tongue was exerting on her cock, when all of a sudden there was a knock on the apartment door. Alessia shouted ‘Come in, it’s open’ and I grabbed a blanket that was on the couch and put it over her from the waist down which covered my head as I was not going to stop sucking my baby. It was our mutual friend who had first introduced us to each other. She obviously saw that I was under the blanket and smiled saucily as knew immediately what I was doing. Without even a hesitation she said ‘Oh, I’m so sorry, I can come back later but Alessia said ‘No, stay.’
I heard our friend say ‘OK’ and I threw my hand up to wave. I released Alessia hardening cock from my mouth and sheepishly peeked out from under the blanket to say ‘Hi’. She giggled and said again ‘I am so sorry to come over without calling.’ ‘It’s ok’ Alessia responded. ‘He can suck me all day so it’s fine!’ ‘Wow’ she said and Alessia laughed cheekily as I cast the blanket aside. I realised that the blanket was now surplus to requirements and threw it off with relief; we all three new exactly what the game was. I wanted Alessia to feed me her seed and I wanted it now. I heard our friend say ‘Oh God’ when Alessia started to moan more and louder. I knew I was starting to make that cum fill up in her monster cock. I looked over at our friend and she had her mouth agape in astonishment as she watched me suck her big beautiful cock. She seemed lost for words and could only again mutter ‘Oh my!’