It was a new day, Sunday morning and the birds were chirping...Mark hated the birds because they were loud assholes that didn’t let him sleep. Defeated, he went to take a shower, indifferent to the fact he was only wearing boxers and the bathroom was not in his room.
On the way, Zoe did the same with her panties and a shirt.
ZOE – Hey, no! I need to take a shower. Why are you awake now?
MARK – Birds.
ZOE – I hate birds, but you can wait, besides I don’t want to step on you jizz after you are done.
Zoe pointed at his morning wood, showing clearly on his pants. Mark was always average on this department, despite being so large everywhere else, but without a ruler in hand it would be hard to notice that he was now a couple of inches larger, and a bit thicker too. Not that he would, even if he had such a ruler as he thought he always had eight inches down there.
Zoe herself was not the same as last night, she was now an inch taller, like all her sister and mother and a cup larger. Her bottoms had also being changed but it was only a little, to become more rounded.
MARK – I wasn’t going to jerk off in the shower.
ZOE – You always do.
MARK – And how would you know? Are spying on me, Zoe?
ZOE – Of course not, if anything, you would be the one spying, you perv, hehe. Lucy, now!
Lucy had woken up and sneaked behind Mark, and on her signal, she hugged him from behind while Zoe ran, and then locked herself in the bathroom.
LUCY – Sorry bro, girls have to help each other out.
MARK – Well, whatever I’m not that ba...Lucy?
Mark had felt something he wasn’t expecting on his back, Lucy’s boobs.
LUCY – I forgot to put a shirt on.
Despite the loose rules for clothing in the house, boobs were something Mark didn’t see often, but when he did it was because Lucy forgot to put her shirt on in the morning. She didn’t seem to mind him having a look at them, but she only did that once in a while. The problem was that the combination of boobs on his back and the low hug from his sister put her arm in reach of his erection when it jumped out of his boxers due to overstimulation. Lucy didn’t notice what it was at first, but when she did they both panicked for a second before they calmed down and remembered that this is a form of greeting someone, why would it be weird if she did feel his dick.
The thing is that Grace was right, Lucy was in love with her brother, and this whole situation made her horny as fuck, so after feeling his cock for a while, she ran to her room to finger herself.
Mark fit his dong on his boxer and waited for Zoe to leave the bathroom using only towels.
ZOE – Try not to make a mess Mark.
Mark disregarded her recommendation and made quite the mess, which he subsequently cleaned up...he wasn’t a savage after all