GoHem don't exactly have a normal marriage!!! They are very wary of creating waves, they've only just got to an even, balanced footing and this unexpected kiss has thrown everything up in the air. It wasn't a natural progression to a kiss - there was no romantic situation or build up. Neither are aware of each other's feelings so Gopi naturally is worried thay she may have crossed some line or boundary within their realtionship. Ahem hasn't been able to reassure her either because his feelings and reactions are also of shock. He hasn't disliked it but he's not sure what it symbloises for either of them. Also he doesn't know how Gopi feels about him either - her reactions must be making him question that too.