Secrets and boob pressure

The reveal of your real identity should be the only thing in your mind right now, but that is far from true. She keeps hugging you, and her boobs feels so warm against you and too confortable for your virgin and naive mind. You try to act cool and say something intelligent to your recently revealed sister, but you only manage to mumble some unintelligible gibberish. You would like to push her away from you to keep your manly innocence intact, but you are to much of a well educated boy to know that you should not be so rude to a woman. Lucky for you, she misinterprets the nature of your alteration... and hugs you tighter.

"I'm sorry it took me so much to find you," She says "It should have been sooner." She kisses your cheek with a brief sister-like kiss, but it arouses almost as much as the real and lustful kiss that Amelia did this morning. "Mother kept not record of you, no mention of your existence, I only had this to start."

She shows you a picture that seems to be old, it depicts a really young lady Cassandra Barton, with loose hair and not so monochromatic robes, she looks quite happy in the photo, embracing her clearly pregnant belly with a smile. Beside her is an also young man, dressed in a cute manly pink summer dress, and he looks quite like you. "That is Frank, her childhood boyfriend, and your father." Lily tells you. "That is the only photo that remains of him, and that," She points to her mother's pregnancy "That was for a very long time all that we knew about you."

"We?" You ask.

She hugs you tighter again, and kisses you, this time on the other cheek. "I know all of this must be so much for you, things are really complicated and dangerous in this house. I will tell you about it in time, all that you need to know now is that we managed to localise you, and we are sure that you are my mother's true firstborn. She rejected you just for being born as a man and got rid of you as a baby. We didn't know for a while if you even were alive."

"She... she didn't want me?"

She gives you a sad look. "She did not want a man of any kind. I do not know the specifics, but whatever happened with you broke her relation with Frank and from that moment she went really hard into gene manipulation and she went into a very specific process of selection to choose me and my sister's fathers... I didn't knew you where here already, I wouldn't have led you work at the table during breakfast, you should avoid our mother at all cost, there is no way of knowing what she would do should she recognise you... and she is dangerous."

"And what about our sister?" You ask, thinking of Amelia, thinking of your early meeting, her hands on your cock and her lips on your mouth.

Lily looks at you with harsh eyes... "She must not know, never."

"But she is our sister..."

Her tone gets sudddenly really serious. "Listen to me, Mark. Do not trust Amelia, do not ever think about trusting her. My mother at least convinces herself to have a moral justification for the atrocities she does. Amelia doesn't even bother with that. She only cares about her pleasure an nothing else. You would be wise to not even speak to her. I wouldn't want to see you join her long list."

"...List?"

"You must be very careful while inside these walls, you must not call any unwanted attention. I can protect you, I can keep you safe, brother, but you must listen to me: Do what Rufus tells you to do, avoid our mother an sister and everything should be fine."