I dont think you can create bad habits hon with a nearly 3 month old...he's programmed to suck your boob...so he's doing what he is supposed to.
At 3 months, i would be expecting to still be feeding overnight...
Time with DH mmmmm.....can you have time with DH earlier in the night ??? when the two babies are in bed ?? I would be kicking my DH to wake up if i wanted more 'us' time...least he can do.
For what its worth...all my children have loved booby, my DS (11months) still does. And they are all great sleepers now.
I know it seems like you wont get 'us' time...but with my #4 nearly 12 months old....i never thought i would get 'us' time again....but you do.....