You decide to stay another night at your parents to see how far you can take things

You wake up with a huge boner the next morning and use all your willpower not to roll over and fuck Emma, who is laying naked beside you. You think it might be worth saving up your cum for later considering that Emma and your own mom were cum swapping last night. The only issue was that you were supposed to be headed home in a few hours. After Emma wakes up you talk a bit about how exciting the night before was. Emma keeps bringing up having seen your dad's cock - she's clearly a bit obsessed about it now.

You get dressed and Emma puts on a loose tank top. She looks at herself in the mirror and bends over to see how much of an eyeful she could give when bending over. She decides it's not enough and stretches the shirt hard. She looks again, and sees that if she bends over far enough her boobs are almost entirely on display. She's satisfied with this.

When you leave your room you find your parents already in the kitchen - your mom is almost finished making breakfast and your dad is sitting at the table in his robe drinking coffee. They are desperately trying to pretend everything is normal and it's like 80% working - but they are being just a little too stiff and formal. You just try to play it cool as well. Emma on the other hand is just trying to tease your dad as much as possible. She begins doing the crossword puzzle standing up and bent over right in front of your dad. When he doesn't immediately look at her she asks "What's a 6 letter word..." so he'll look up at her. He can see right through the top of her shirt to the points of her nipples hanging down.

"So we decided we could use another day off from work - we'd like to stay another night if that's okay with the two of you," you say to your parents. Your dad looks like he's going to spit out his coffee and your mom's eyes burst wide. They are silent for a while before your father finally says that that's great. Emma notices that your already has a boner.