It's going to take effort

You kept an eye on Isabella for the rest of the day. The tension was clearly getting to her, but you were really having a hard time caring.

After some time with Madison by the pool, you walked in to see Abby sitting next to Isabella. Abby was playing with herself and, as best you could describe it, narrating to Isabella.

"Sometimes it feels so good when I go a little slower," she panted with the effort of speaking, "like this," and demonstrated what was feeling so good.

Isabella watched her, both horrified and fascinated.

"I really like this too," she grabbed one of her nipples, gently tweaking it as she played.

Was she... trying to teach Isabella how to masturbate? Did she not understand what was going on? Isabella looked incredibly uncomfortable with the whole situation, but still had her eyes locked on Abby's pussy, watching her pleasure herself.

When Abby was finally done, she walked out of the room past you, wearing the most pious shit-eating grin you had ever seen. Good-girl Abby had definitely come a long way. Maybe making people cum wasn't the only thing that could motivate her.

Isabella looked like she was going to pass out.

Later in the afternoon, you were sitting on the couch, recovering after Emma had been particularly enthusiastic about riding your cock. Abby had been licking your balls as she did it, and you were reliving the sight of her popping up from between your legs when Emma finally unmounted you.

When you finally got your senses back together, you looked across the room to see Isabella. She was staring at your cock, having watched the proceedings. She looked up and made eye contact with you. A determined look came over her face.

Isabella stood up and walked across the room. To your surprise, she wordlessly dropped to her knees and wrapped her hand around your cock. She slowly pumped it with her hand for a few seconds before, with a slight grimace, leaned forward and guided it into her mouth.

It definitely wasn't the most passionate blowjob you had received, but if you had to describe it in one word, it would be "determined".

You reached forward to feel one of her glorious breasts. She grunted unhappily, but continued to suck you like your cum was the one thing she wanted more than anything else.

You could have warned her when you were going to cum. Instead, she let out a surprised "mmmmff!" when you started to fill her mouth. She definitely wasn't happy, but she kept sucking until she had swallowed every drop she could.

When she was sure you were fully drained, she finally popped your cock out of her mouth, looked up, and **** a smile. She stood up and walked out of the room, still never having said a word.

You went to find Lily. After a brief discussion, the two of you went to find Isabella.

She was in the bedroom where she had been sleeping. You hadn't really been in there much. It seemed to have been outfitted as a kids room: small bed, fake hardwood floor, a dresser that looked like it was found on the side of the road.

Isabella was sitting on the floor, head in her hands. She looked up when you and Lily sat on the bed across from her.

You started, "Isabella, I think you're making real progress with us, learning how being kind to people is a better way to live your life."

She looked at you with hollow eyes, but didn't respond.

"But, I'm not the one you have been so cruel to over the years. You should be trying to earn forgiveness from Lily."

Isabella looked at Lily. Lily slowly opened her legs.

A look of fear came over Isabella, "you want me to..."

You assured her, "that's what Lily likes, and I think you want to make her happy."

Isabella paused, but then crawled slowly toward Lily. She cautiously brought her face toward Lily's beautiful pussy. She grimaced, stuck out her tongue, and gently licked the length of Lily's slit.

You knelt beside Isabella so you could watch her lick from close up. She wasn't enjoying herself, but she was doing everything she could to fake it.

"I think you're going to start enjoying the taste of pussy," you assured her, "especially when you find out how you'll be rewarded if you do a good enough job."

Isabella paused and looked at you. After a second to process your promise, she dove back into Lily's pussy with a new enthusiasm.

Just like the blowjob she gave you, "determined" described what was going on. She licked, she sucked, she slurped. She did anything she could think of that might get Lily off.

For her part, Lily was starting to enjoy herself. She was watching Isabella with a slightly evil smile and starting to breathe a little heavier.

You reached between Isabella's legs to grope her cunt. She grunted unhappily, but quickly realized that this was the only stimulation she had received from anyone for days, including herself. She pushed her pussy toward your hand before you pulled it away.

"Not yet," you warned her, "you haven't earned it." She had left your fingers wet. You wiped them off on her tits, stopping to give her nipple a firm pinch. Her reaction was muffled by Lily's pussy. You grabbed her other breast roughly and gave her other nipple a light pull.

You assured her, "I think you're going to enjoy your reward for this," and let her concentrate on Lily.

She was trying her best, but she wasn't a natural pussy licker. You hated to see Lily receiving anything but the best treatment. You pushed Isabella roughly to the side, "watch how it's done."

After a few minutes of your attention, Lily was her usual moaning self. You leaned back, grabbed a handful of Isabella's hair, and pushed her back into Lily's crotch. "If you can't get her off now, there's no hope for you."

To her credit, Isabella seemed to have been watching. She pushed her face against Lily's pussy, and gave it all she had. Soon enough, Lily's hand was holding her head against her pussy, and she was moaning in ecstasy.

Isabella was doing her best to keep Lily cumming, looking up at her in wide-eyed amazement, watching the orgasm she was causing.

When Lily finally came down, Isabella sat back and leaned against the wall. She was breathing heavily herself, shellshocked by her own performance. She wiped her mouth with the back of her hand.