Is it normal when your girlfriend doesn’t want sex anymore, you crave her daughter

NO!!! What you are doing is disgusting, and immoral, and you should be ashamed of yourself. It may not legally be incest, but what you are describing is very much like incest, and it is wrong. Also I'm sure your girlfriend, and her daughter have not consented to any of this, you disgusting piece of shit!

If the girlfriend said look else where then you can have your cake and eat it. However, that doesn’t make it ok to be a pervy creep spying on her daughter and stealing the girls underwear. Men like you make my skin crawl, you are a disgusting pervert that needs locking up and throw away the key.

If you go for the daughter you'll loose both on the end. Dont do it man

You're a creep.

This is very unlikely to work out - even if you have permission.

But; I'm also a believer that there's always a situation where it does work.

Why don't you ask your girlfriend if her permission includes her daughter (do it kind of jokingly). If she says yes, then you need to say "Really?" in a more serious tone.

If she again says yes; ask her if she will talk to her daughter and let her know about the situation between the two of you, and that she would not be bothered if the two of you hooked up; and let the daughter show interest in you for that.

Be aware though that:

1) Chances are she knows that you have been watching her daughter and am interested.

2) That you and she are not communicating well as it relates to "love language" and that is why your GF is not interested in sex anymore. The chance that its' a medical issue is low; and most medical issues can be treated.

3) That her permission may well be a setup to justify formally breaking up with you (especially if you make a move on her daughter).

In the end - until you really understand why she has given permission for you to have another - I believe that you need to tread very cautiously.

A) I highly recommend that both you and your GF reads "The 5 Love Languages" by Gary Chapman. Don't move on onto another lady until you are sure that her "love tank" is relatively full from you (and my guess is that it's totally empty at this point). Note that both my wife and I too have permission for other partners - however, we both are very interested in sex and that permission exists even when our love tanks are overflowing (we see sexuality different than many and monogamy is not linked to our relationship vows, and there are rules on who is acceptable).

B) Even then - if the permission is real when her love tank is full: you are much safer with anyone else (even her daughters friend) than the daughter unless her mother (your GF) actively introduces and encourages both of you to be sex partners - and the daughter is clearly interested in you for sexual play and more.

You are likely to be many times better off to find other sexual fantasies and replace the one about your GF's daughter. You can actively chose to shift sexual fantasies to someone far safer and more appropriate (experience tells me that this takes many months or even more than a year to pull off: I've done it to eliminate my ancient teenage fantasies of young ladies - which were age appropriate at the time they started; but, not suitable for a 40 year old man - and a mature man learns how to control their fantasies to keep themselves out of trouble).

I wish you well in successfully sorting this out.

do not go for it

If I were the girls bio-father I'd probably want to kill you, slowly.

You are a perv and you should tell your girlfriend this.
It'll be fun.

Yes go for it,

Your fucked up its one thing to think about it but acting on it is duranged

I have read erotic stories with this story line. It sounds like you have too. Plagiarized in my opinion.

If you knew her when she was a child it is not wrong on paper but....Maybe figure out why she lost interest. May just be time to move on. What’s the sense of goin and getting it elsewhere when you have someone at home takin up valuable space.

Errr you do know there are plenty of other non related women out there you creeper.

No. Family, blood or not, is off the table

Dont film her or sniff her panties. Dont you feel creepy doijg that?

I think you should fuck her regularly.

That is all kinds of wrong. But at least she is legal. Perhaps you should speak to your girlfriend not about your attraction to her daughter but that her not wanting to have sex is causing issues. Is there a reason why she dose not want to have sex anymore?

Stop cheating.

Go for it.