Having been away for school for two years and returning home my jaw dropped upon entering the house when my younger sister Beki ran up hugging me and wouldn't let go we were always close and she always called me her boyfriend.Seeing what she's turned into I was wishing I wasn't her brother and was her boyfriend at this minute.She had been out at the pool when I came in the house and our mother yelled Andy's home.She came running at me from out side by the pool into the kitchen the towel she wrapped around her waist falling to the floor just before hugging me.When she finally let go and stepped back I about lost my words.She looked at me and said so what do you think big brother I am all grown up arnt I.I swallowed hard and said yes you are I bet every boy at school wants you and your boyfriend is one lucky guy.She smilled and said I don't have a boyfriend silly remember your my boyfriend besides mom and dad said I couldn't date until I turned 18 and that will be next week besides boys only want one thing unlike my big brother.So here I am looking at the hottest girl I've ever laid eyes on who just let me know without her knowing it that she's pure as can be still intact and never been touched my virgin sister who I wished was not my sister but my girlfriend at this moment.She said you alright Andy your really quite what you thinking about. So what do you think as she stepped back further so I could get a more detailed look of her body like I needed it.Beki was now 5'4" tall with redish blonde hair down past her but and thick as a horses tail.Her aqua suit was supper tight on her .Her young breasts about a small size b about a hand full were standing at attention with her beautiful hard nipples pushing through her swim suit top.Her bottom had two tossels one on each side that looked like they could be pulled and her bottoms drop right off.But what really caught my eyes was my weakness or criptonite the most beautiful sexy cameltoe I've ever laid eyes on.She may as well not had a bottom on because it showed through like she had nothing on and you could read her lips.Her hips had widend I noticed making it easier for her to give birth and she was definitely ready for that I could tell her body was toned and tanned and her beautiful stomach was tight as she unknowingly kept rubbing it in circles .Your the most beautiful girl I've laid eyes on I tell her.Mom says I am a women now I said but you have to have a boyfriend to become a women .Well than your my boyfriend Ok then. I'll help you become a women is that what you want Yes well you'll have to tell me your cycle I say .What you mean You know I say when was your last it starts with a P.Oh that she says 12 days ago I can tell cause my starts getting swollen as she points at her cameltoe.So does that always happen yes.Good I say now knowing when she's not safe .God help me this summer all I can think about is separating her beautiful cameltoe with my thick 12" dick and shooting my seed into her unknowingly ovulating body and picture me rubbing her growing stomach as my child grows in her and she has no idea yet.That is until I lay in bed hearing the morning sickness starting as I smile grabbing my 12" stroking and congratulating him!!!