The comm won't let me post any links at the moment, so I'm just gonna have to give you journal names and story titles. I've tried a ton of ways, but it just won't let me, I'm sorry...anyway...

I freaking ABO fics so I've got some great recs for this. I'm not sure all of these specifically fit your request, but they are some of the best ABO in the fandom so I can't recommend them highly enough. :-)

Jeff/Jensen. Kangaroo Care by kiltsocks is absolutely wonderful, as is it's sequel The Importance of Bonding.

J2. I love this one too. His Omega by mznaughty01.

Ownership by lycaness.

One is the Loneliest number by torrinne.

Duke of Truths by mznaughty01.

Bitten and its sequel Changed by morrezela.

Great Brother, Lousy Beta by sdwbf.

Cold Snap by bertee.

hybridshade's Claim to Stake and its sequel The Right Kind of Medicine.

Gotta Feel You In My Bones by mrs-weaslebee.

The Breath You Take by alienat.

In the Company of Wolves by insane-songbird.

I'm sure I've got loads more but that should be enough to get you started. :-)

xx