The views only get better on the ride home

My stepsister and mom lead the way my dad put his arm around me

"Great to see you Mark I'm hoping we can make this the best summer ever for you. I'm sure your sisters and Kim will make you very welcome"

"Cheers dad. Let's hope so ha"

All the time he's talking my eyes are fixed on the two fine arses in front. Emma's is so tiny and tight and in them denim shorts it looks so fine and you can just see the bottom of her tight pert cheeks. Then I switch to Kim, fuck those legs are hot, my eyes run up to that arse of hers fit round and plump asking to be spanked. And you can just make out her thong threw her skimpy little dress.

With my bags in the car I sit in the back with Emma and as we pull away she lifts up her shades resting them on her head. Turning to me she just winks and her hand rests on my leg and she slowly rubs the inside of my thigh. I can feel my cock grow and I'm not sure what's going on but it feels good

"So then big brother we going to have fun then"

Giggling her hand runs up my leg and over my stiffening cock. Shocked I blurt out her name

"Emma!!!"

Kim pulls down the sun visor and looks at us both in the mirror

"You better be nice to your brother girl"

With a cheeky naughty grin on her face she nods and replies

"Oh I will mom im going to be very nice and I'm so looking forward to showing him a good time"

Her hand slides over my cock again and she flips down her shades leans back and sighs. Not knowing what to do I do nothing, I just look ahead. Kim adjusts the visor and I got a full view of her cleavage and the top of her tits, and now I'm rock hard. Looking at me in the mirror she smiles I can feel myself blushing

"Well then young man I hope you enjoy the scenery and I'm sure your sisters and me will make your stay very pleasurable