You walk in on your sister, who still has her tits out from feeding. Admittedly, this isn't the first time and she has noticed. Instead of just brushing it off again as she has before, she confronts you about it. This must be a Freudian thing, she says. You weren't fed from the breast, so you must be curious about lactating breasts. It's true, hm? She decides to let you try her milk, but that's it. Things can't go any further... But later that night, she turns up in your room. She's in a robe with lingerie on underneath. And she's extra flirty. She says it isn't right for the two of you to fuck, but she just can't stop thinking about you trying her milk earlier. Her breasts are engorged and she needs some release... so she wants to feed you herself. Although we are siblings, and this might be taboo, it’s not really like that because you’re just suckling milk from her and getting nutrition. We're not having sex, that would be another thing altogether. Only, the more that she lets you suckle, the hornier she gets. She's getting really wet, and even though it's twisted and wrong, she can't help herself! Grabbing your cock and giving you a hand job, she's really into it... and before long, she can't hold back and desperately need you inside her. "Now you’ll have two obsessions, your big sister’s lactating breasts and her warm wet pussy. But don’t worry, you’ll get plenty of both, little brother. Warm milk and warm pussy!"