Hopefully there's a tag for the sibling swap bit...if so, someone replace my "sibling crossover" and "sibling borrow" tags with it ><;;;

Not siblings IIRC, but male versions fucking the others female version.

never seen girls singing opera's during sex , now i did.

Aehr said:
Hopefully there's a tag for the sibling swap bit...if so, someone replace my "sibling crossover" and "sibling borrow" tags with it ><;;;

There is now.

this isn't sibling swamping...if you look at them closely you can see it's just the same two guys taking turns being the female in the relationship...it's gender''shifting''

me like this alot XD

dude1982 said:
never seen girls singing opera's during sex , now i did.

lol

The males' hips are awfully low when compared to their torsos.

Kira said:
Not siblings IIRC, but male versions fucking the others female version.

That is the biggest waste of a parallel universe crossover EVER.

Fuck yourself damnit.

Nice to see two families sharing

Here it is: http://www.furaffinity.net/view/2800006/ Looks more like 2 gender-swapping fursonas, rather than 4.

Marbles said:
Fuck yourself damnit.

That's what they're doing. Yes

relic said:
this isn't sibling swamping...if you look at them closely you can see it's just the same two guys taking turns being the female in the relationship...it's gender''shifting''

Or Genderswap Alternate Dimension Foursome!