Lactating Boobs get Milked

I was hard at work yesterday when my friend called me and told me to go over to his house because he had something which he had to show me. I was so curious that I agreed even though I had a lot of work to do. When I arrived at his house he led me into his bedroom. That was the first surprise. The second one was that his wife was sitting on their bed and had a milking machine attached to her tits. My crazy friend used the opportunity of her being pregnant to milk her and to drink her sweet milk afterwards. Strangely, I felt the whole situation very arousing so I touched my cock and then started wanking off.