She suddenly pulled it down and also noticed my boner. She didn’t say anything.The photoshoot continued and I took many sexy pics of my sibling and ...sked her to change into a red Satin mini-skirt. Now, she didn’t mind me seeing her changing her dress as she knew that I already saw her half nude. All this time, I was having a boner and at last, I somehow convinced her to wear a two-piece green bikini.My sis wore it and I took a couple of pics. That was when I noticed some of her pussy hair. ” Just then she mounted me, and I got excited, real excited. Then with the worst timing ever, we heard our parents coming. She quickly jumped off me and got back under the covers, and not a moment too soon. Our parents came in and saw us holding the gifts we had gotten from each other. “Happy birthday you two!”“Oh look they gave each other a gift,” our mother said smiling. “Come on honey, let’s leave these two to their business,” our dad said while dragging our mom out of the room. “Breakfast. “Goofy grin?” her mother asked.“Yeah, Mom -- you know ... The one that makes us look like Alfred E Neuman. Go on, Mom -- I’ll do it if you’ll do it.”“I’ve seen this,” Adam said.Kara sat beside her mother and they both made wide, artificial grins. Adam put his hand to his mouth to suppress laughing, but Arthur laughed out loud. “I hope you don’t want your ring back,” Constance said.“Not at all ... That was amazing ... two peas in a pod.”“If you give her a compliment ... like telling her she has. Was it good?” “Oh yes. Almost the only disappointment was seeing yo getting Evelyn’s knickers off.” “Because that’s part of the foreplay you enjoy.” “Yes. But the rest was good. Evelyn was – well, not better than you, just different. Did that trouble you – seeing us doing it?” “No. It was kind of exciting. What about you seeing Alec and me?” “I have to admit there was a point when you had your ankles on his shoulders and I could see his – his dick going into you, I was so turned on I almost.