From the titles of ep.11-13, I think most of the honeymoon part will be cut off. It is difficult to cover the honeymoon with the Yui side story together in 2 episodes, unless they cut some parts in the Yui side story. There's also the matter with how much ep.10 will cover. If ep.10 doesn't end at the point where Kirito proposes to Asuna, then the Yui side story will be covered even less. We can estimate how much ep.11-12 will cover once we see how ep.10 will end.
Many fans will be pissed if ep.10 ends with Kirito proposing during/right after the Kuradeel incident, and Kirito and Asuna's night together cut off. It's better that it goes like this:
ep.10, 1st half: Kirito and Heathcliff's duel (quite a short duel), poisoning starts, ends at Kuradeel revealed to be Laughing Coffin
ep.10, 2nd half: Asuna arrives, Kuradeel dies, Kirito and Asuna kiss, night at Asuna's, ends at marriage proposal.
or
ep.10, 1st half: Kirito and Heathcliff's duel, ands at poisoning starts.
ep.10, 2nd half: Kuradeel is revealed to be Laughing Coffin, Asuna arrives, Kuradeel dies, ends at Kirito and Asuna kiss.
ep.11, 1st half: Night at Asuna's, marriage proposal
Hopefully the preview which comes out in about 2 days will give us an idea. If not then we'll have to wait till next week.
Also, in the image thread (page 26) there is a picture (NSFW) of Asuna in her underwear. It might be what she will be wearing during their night
. Seeing that pictures makes me believe that the night at Asuna's will be shown after all.