My girlfriend's sister is seducing and desiring me. what should I do?

i am having a loving relationship with my girlfriend for more than 4 years now. I am 27 and my girlfriend is 23. Although, we have not moved in I spend most of my free time in her apartment. She lives there with her elderly aunt and her younger sister who turned 19 this year. i have always looked at my gf's sis as a small kid, and treated her so, kos since she is about 13yrs old I know her..yes we have hugged cuddled, and kissed on cheeks - but always as a kid sister. The thing is over the past few months, she has become quiet bold and started to be flirty with me. I didn't mind too much on that... But now recently, she has started to seduce me - like wearing revealing clothes and making a show for me..like day before yesterday, she came up wearing a real tight shorts and a loose t-shirt, with a large neck.. As I was watching TV, came and asked whether like to watch a film and before I could answer, was bending in front of me (as she put a film in DVD player) showing me her ass. the shorts was so tight I could see outline of her p**** lips..As I was trying to look away, she turned still bending..and from the T-shirt neck I could see her breasts, bare without any bra..as she caught me staring she just bit her lip and then sat next to me..and asked me whether I like what I saw! I asked her why she did that, and she told me she likes me..just like how her sister likes me! I told my girlfriend about this event and similar other events, but she just laughed it off, saying her sister is young and innocent. And when I push further she is saying I am turning into a dirty horny old man getting turned on by small children And the worse thing is, I get horny and hard when my GF's sister teases me like that...and she knows that too. when my girlfriend is with me she will act normal, but sometimes will do subtle things like caressing my feet with er toes under the table.. How can I come from this without breaking my relationship with my gf? And I don't want to hurt my GF's sister either, or to break the trust/love and understanding between them. What can I do?
Updates:
+1 y
However much I tell, my girlfriend don't believe her sis is seriously seducing me. This has made her sis bolder. last week, after shower she came in front of me wrapped only in a short towel and started to flirt and tease giving me a show. I kud see most of her inner thighs and boobs. and her sexy moves turned me on giving a hard on. she saw the bulge, caressed it over my pants saying she want it. I moved away. but now, I think of her sexually when horny and alone. I lust for her but love my gf! Am I bad?
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Most Helpful Guys

  • first off, it is normal if a 27 years old guy is turned on when he sees a 18 years old girl. come one, 18 is adult age. second, you are not considered cheating on your GF. you are just horny. that's all. it doesn't mean you want to make a secret relationship with your GF's sister.

    be assertive. tell your girlfriend that you have rejected her sister and she has to warn her sister too. because this is her problem too. since this is not your mistake, you basically are not the one who deserves burden or to blame (especially since you are not cheating). your girlfriend's sister needs to be taught to respect someone's relationship, especially since the guy she seduces is her sister's boyfriend. and your girlfriend has to realize that she can't just think its not a big problem to her.

  • Your girlfriend is pretty naive if she thinks it isn't possible for her 19-year old sister to seduce anyone. I don't understand why you're trying to convince your girlfriend that her sister is trying to seduce you. You can control the situation just as much as your girlfriend can.

    The thing that sounds disturbing is that your girlfriend doesn't notice that her sister is pretty much an adult and is letting her get away with things just like a child would.

    If she doesn't trust you about this after you've been together for four years you may need to breakup with her.

Most Helpful Girls

  • First off you need to be firm with your gf's sister and tell her to STOP it. Tell her you will tell her sister. If she keeps it up you need to let your Girlfriend see what you wrote here. You need to set the boundries and be firm about it.

    If you don't do anything and you let this go on you will be helping to create mistrust lack of love and pain all around.

    If you do deal with this and put it to an end you did nothing wrong.

  • tell your girlfriend that her sister is being serious.. apparently your girlfriend thinks it's just a joke and nothing too serious. Tell her that you are getting hard when her sister is teasing you like that. I'm sure your girlfriend would talk about this with her sis after.

  • i do a lot of the same stuff to guys, especially my dads friends. I mainly just like the attention and knowing I have that power over guys. I have gone over the line on a few occasions, but she's probably just having fun.

    • but hv you really held a c0ck of year dad's friend and said you want it? it seems my gf's sister wants to f*** with me. do you think its a one time thing? if I do it she will be no longer teasing me.

    • Lol, obviously you want her. Just do it!

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What Girls & Guys Said

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  • some guys get all the luck, eh?

    it sounds like a phase - a fantasy on her part. Girls that age tend to get reluctant to turn fantasy into reality. When it comes down to 'doing the deed,' you'll probably find her to be far more bashful than she is behaving now. Just let her do her thing. Nothing should come of it.

  • Young girls like to tease, from what I have found. I wouldn't make much of it. She will stop if you don't respond to it. Maybe just tell her that you are flattered, but you would never do anything to hurt her sister.