Hard to say no, she sat and ordered. While the barman was getting her a drink and me a refill, I asked the obvious question; she said that she wanted ...to play host and didn’t feel comfortable in front of her husband to suggest it, so followed me to the hotel on the off chance I was going to have that drink. I wanted to slap myself for needing a drink, but there you have it. So, two parents of different c***dren in the same relationship, you would think we might have a lot to say, but we ended up. "Th ... thanks," she said. Holding on to Mark's arm, she ascended the two steps and leaned gingerly forward into the metal frame. She sighed loudly as her heaving breasts swung forward. They wobbled beneath her and started to leak again. Droplets of milk spattered the sawdust underneath the frame.Mark walked around the side of the machine and lifted the milkers from their hooks. He slid them underneath in a practiced motion. Emily jumped as the cups grazed her sensitive nipples."Sorry miss,". As she was very fair she was looking very beautiful.I started kissing her boobs without removing her bra. (During phone sex we used to call sucking of boobs drinking of milk. I used to drink her milk almost every day in phone sex and she used to love them even in phone sex).After few minutes of kissing her breast her tummy navel for which I was crazy about, she asked “don’t you wanna drink milk?” I said “baby with pleasure, I am hungry for it”. She removed her bra and what a heavenly site it. ’ shocked I see my sister move to sit beside the girl and slowly undo the robe enough to expose her breasts, ‘Mmmmm sexy’ my sister whispers. Amazed I watch as she reaches out and cups a breast and flicks her finger over the nipple eliciting a light moan from the girl.... I sit and stare at the scene, unsure whether to stop watching or not I see the girl lean forward and kiss my sister passionately as she starts to undo her blouse pushing it off my sister’s shoulders.Gasping ‘No’ she pulled.