Is dating both sister morally wrong if both consent to it?

[SazidRahman]

Like I have got a proposal from my girlfriend'a big sister and my girlfriend is okay with it. we are polyamory couple as my girlfriend also has other boyfriend beside me. Will it be morally wrong also dating her sister?

[Maybe_Maybe_not]

For this thought experiment, I believe both sisters would then consent to an incestuous situation, with or without clear awareness of what is implied and what is fantasized. Then there's you validating their incestuous scenario, if you accept her proposal, which tells something about you as well. That's how I see it on a moral level. On a psychological level, I believe this trio is about to be hurt in a way I don't want to be involved with lol

[SazidRahman]

How is it incest?

[Maybe_Maybe_not]

it isn't incest manifested, it is, as I said, an incestuous situation or scenario involving 2 sisters who both know they are going for love & sex with the very same guy. While they're expected to desire a person they won't share, exactly to avoid this incestuous scenario...

[zombiewoof]

What is wrong if all consent

[zombiewoof]

thanks for mho

[Staximus]

You're asking for trouble genius

[SazidRahman]

What kind of trouble?

[BarryLiverstone]

I wouldn’t do that

[SazidRahman]

Why?