The characters in this story are all over eighteen and the age of consent, sex if it happens is consensual. UK English is the rule: if the spellings Mum, arse or colour annoy you, don't go any further, for the rest of you enjoy.
*****
"Ow, Ow, Ow, stop , it's hurting stop, please." Lola, struggled underneath Maria, the short thick rubber strap-on dildo, was hard inside her and Maria was pushing against her.
"Sorry, sorry, I got so carried away, I heard Jack and Chloe making love and I got really turned on, I'm so sorry."
Maria slipped the rubber cock out of her sister and bent to kiss her tenderly. Lola, passed her hand through Maria's hair and returned the kiss.
"It's okay, just be a bit more gentle at first, I'm not used to having that thing inside me and truthfully I'm not sure I want it there at all. I like it when you use your fingers, or your mouth and your tongue." Lola eased out from under Maria and slipped the dildo out of its harness. "Its not like Jacks or Uncle Jose's or even Dave's. It's too hard, do you think you'd like it in you?"
"I don't know, we haven't tried it on me yet, but I guess not, it's nothing like the real thing. Have you ever had the real thing in you?" Maria made a little round mouth shape and pulled her sisters hand up towards her, slipping the dildo between her lips.
"That's disgusting, does it taste of me or rubber."
"You and rubber, but mostly rubber, yuk."
"I've never had a cock in me, or put one in my mouth, I know you haven't, because you never cease telling me about your lack of experience with men."
"Would you like to try it, you know just once to see what it feels like?"
"I don't know, I love sex with you, but a man, I really don't know if it's for me."
Lola began threading Maria's hair through her fingers, Maria bent to kiss Lola's breasts.
"I used to love doing that to your Mother, said a voice from the doorway.
"Auntie Vikki, sorry we thought you were all out on the beach!" Lola exclaimed, dropping the dildo on the rumbled bed.
"We were, I'm the advance party, the others are walking back with Jose."
"Sorry, we'd better clean up and get dressed," said Maria, sitting up and untying the strap-on.
"No worries, it's not as if we haven't seen you naked before, besides I'm sure Uncle Jose appreciates the sight of so many beautiful naked women around him." she laughed and came to sit on the bed.
"Don't tell Julia I told you, but we had a fling for a while. I was involved with Jose, but your mother looked so delicious I had to have her, I'm such a wicked sister, but your mother was cute and fresh and radiated light into every room she walked into. I see the same with you two and Alba and Christine."
Did Uncle Jose and Mum ever, you know.." Lola paused and looked at her Aunty,
"I'm not sure, but good luck to her if she did, he's been a fantastic lover and he keeps me happy, why should I worry if he spreads a little of it to his family."