Your step-mom is pregnant, and she's having a lot of anxiety about it all. Especially breastfeeding. I mean it's been so long since she was last pregnant, and even then, she didn't breastfeed. But you don't want to hear all that, she says, after you walk in on her trying out some latching techniques she learned from her lactation class. Of course, you've noticed her tits getting bigger, and the sight of them like that only furthers the filthy thoughts you've been having about dear step-Mommy's milk coming in. You shouldn't, but you can't help it. You'd regret it if you didn't seize the opportunity. Preying on her anxiety, maybe a little, you offer to "help." Yes, help. Hands on help. Or rather, mouth-on help. You can help her learn these latching techniques. You can sit before her, let her guide her nipple into your mouth and urge you to suck, tasting her colostrum, getting hard at the thought of her milk coming in, flowing and coating you, your mouth, your cock...god, you're so hard. And...is she breathing heavier? Is she...moaning a little? You swirl your tongue and flick, suck, worship your step-mother's heavy dark pregnant nipples until she gives in, reaching down to stroke you while you suck, before taking your cock out and wrapping her big, heavy milky tits around it, stroking you up and down until you shoot hot cum across her gorgeous breasts.