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I dropped my mouth to her breast and began to suckle. As we continued to cuddle and pet each other my hand lowered to Lisa's pussy, she was already wet her lips slick with her juice. I rubbed my fingers along her swollen lips and gradually applied some pressure as first one and then a second finger found its way into her womanly core.
Lisa was starting to writhe under me and her hips were thrusting towards my fingers each time I slipped them into her,
Stacy and Clare had stayed close by and Stacy still naked was kneeling behind Lisa's head gently massaging Lisa's shoulders.
Clare must have been feeling left out as she joined Stacy and started to fondle her lovers breasts.
Stacy moved her hands down towards Lisa's breasts and gradually started to massage each breast gently; to my surprise, Lisa's nipples grew even larger.
Clare never one to be left out had continued to fondle Stacy's breasts whilst nibbling her ears and kissing her neck. Clare's free hand had moved down to Stacy's soaked pussy, so wet in fact that the loudest noise in the room was the sound of Clare's fingers slopping in and out of her lover.
Lisa had obviously decided things were not moving quickly enough, she took my engorged penis and her hand and started to slowly wank me off. I thought all my Christmas's had come at once.
Stacy and Clare were enjoying there own company and had moved away from Lisa and I, looking over I could see Clare and Stacy had moved into a 69.
Yet again Lisa had decided to speed things up a little, she stopped rubbing my prick and pulled me towards her. Slowly she guided me to her womanly core. Suddenly I realised what was about to happen. Something stopped me; I used all my strength to stop what was happening. Lisa looked at me her eyes asking what was going on.
"Do you realise what we are about to do Lisa?" I asked, half of me just wanted to fuck her senseless, the other was thinking she was too young, too complicated.
"I'm sorry Lisa, I can't you are just too young." I said, pulling myself away from Lisa.
Lisa's face dropped, she looked distraught. I just did not know what to do or say, but even though here I was having and incestuous relationship with my sister and her lesbian lover. There was no way I was going to have full sex with Lisa, she was still under 18 and just given birth to a gorgeous baby girl.
I realised that I felt very protective of Lisa and Phoebe and there was no way I was ever going to let anyone harm either of them. It was then that I decided that I would do something to ensure the future for Lisa and Phoebe.
Stacy and Clare had realised that something was wrong; Lisa had started to sob and had rolled up in a ball.
Clare gave me a concerned look, whilst Stacy moved to Lisa and held her; the young girl broke her heart and cried her eyes out. This made me feel terrible, I got up and went into our bedroom. I lay on the bed, my head spinning I knew that I had done the right thing, but I felt terrible.
"Dave, Dave wake up darling." Clare was shaking me awake. I had fallen asleep on the bed some four hours earlier. I got up and took a shower, the hot water bringing my body back to life. Whilst taking the shower and then dressing and decided what I would do for Lisa and Phoebe.
I joined the others in the family room, Lisa was nursing little Phoebe, to my relief she gave me a little smile when she saw me enter the room.
Stacy was a different matter however; if looks could kill, I would have dropped dead on the spot. She motioned for me to follow her into the kitchen, which I did.
"What the fuck are you playing at Dave; you can't play with Lisa like a toy." Stacy screamed.
"Stacy, listen to me. I think Lisa is gorgeous, just like her older sister but she is still only seventeen. It would not be right of me to take advantage of her. I admit I could have come to that realisation before I did, but I am happy that I did not have sex with her. Lisa is worth more than that, she deserves better and I intend to see that she gets it." I replied.
Clare came rushing into the kitchen. "What's going on you two - I could hear you down the hall." She said giving us both a stern look.
"I'm trying to find out what the fuck Dave things he's doing messing with Lisa like he did before." Stacy shouted.
"OK you two pack it in; we need to talk this over, all of us together. Come on lets get this over with." Clare said, returning to the family room.
Stacy and I joined Clare with Lisa and Phoebe in the family room. I decided that I had better take control of the situation before it became a slanging match.
"Lisa, I'm sorry about what happened earlier, I'm the adult and should not have let things get as far as they did. Please do not think that I am not attracted to you, because I am. You should be very proud of Phoebe, but you've also got your own life that you need to take care of." I said.
So far so good, everyone else had kept there mouth shut. I continued, "The last year has been amazing, getting together with Clare and meeting you as well Stacy. We all know there have been some bad times as well, what with my Dad and the accident. Lisa will need to finish college to be able to have a chance for a decent career."
Stacy jumped in "How the hell do you expect her to finish college, she has no money and nobody to look after phoebe if she did go back to college."
"If you let me finish I'll tell you, but first answer me a question." I responded.
"Sure fire away." Stacy replied.
"Do you like working in the boutique?" I asked
"You know that I hate that job Dave." Stacy said.
"Do you like children Stacy?" I asked
"What is this Dave, ask Stacy stupid question day. You know I love children." Stacy replied obviously getting somewhat agitated with my questions.
Time to reveal the master plan. "I thought so; my idea if everybody is agreeable is to pay you Stacy to look after Phoebe whilst Lisa goes back to college. I will match the salary you get at the boutique and pay the college fee's for Lisa. What do you think?" I asked.
Clare looked surprised, and perhaps a little upset with me, as I had not discussed this with her before announcing it to everyone.
Lisa had a huge smile on her face. "Dave you are amazing, I don't know what to say. I didn't think I would be able to go to college."
"Whoa there young lady, I haven't agreed to take care of your rug rat yet." Stacy said.
Lisa's face dropped and I really thought she was about to cry before Stacy cut in again.
"But of course I will. Especially as it gets me out of that boutique and more time with my favourite niece." Stacy said with a smile.