Lulu and I are hanging out, when she asks me how my boobs have gotten bigger. I tell her that i've been taking a supplement to make me lactate and it's the milk inside which swells them up and makes them seem fuller. She can't believe it and asks me to show her. All I have to do is gently squeeze my nipples and the milk oozes out of them. She's really curious to taste it, having never tried breast milk before. Soon she is lapping it out of my nipples and I squeeze warm jets of creamy milk into her mouth. I try some too after she tells me how good it tastes. Before we know it our skin begins to stretch... the hormones must be in the milk!! Our breasts expand to an enormous size. We are really shocked but also happy with the massive size of our new tits. Curiosity gets the better of us again and we feed on more of each others milk. But soon our tits begin to expand again!! They get so big and heavy that we can barely get up. We try to drain the milk once more so that we can stand up, but get stuck in a continuous cycle of feeding from each others milk to relieve some of the heaviness and then getting bigger again!!