Sad. Lois is in love with Clark and he barely tolerates her.
He does admit he's attracted to her, though. However, attraction and love are not the same thing. Is it a step? Yes. Should they just jump into bed because she loves him and he's attracted to her? NO. Absolutely not.
Like other people have said in this thread, they need to talk first. Bond, let their relationship develop.
Second, while Lois wants to sleep with Clark because she loves him (and actually tries subtle seductions)I don't think she would really want to sleep with him while he's still thinking about Lana, either.
Sex should be special. And I can't think of anything sadder, or more horrifying, than it being special to one parnter and "forced" or "just fun" for the other.
I will agree that he's shut off some of his early issues with Lois because he wanted to believe he didn't have any problems with Lana. In the cabin, he did have a dream/foreshadow where he and LOIS werer on their honeymoon. Furthermore there was this
Lana wouldn't understand that though.
I sighed. How was I going to tell her about all of this?
I'd talked to her for quite a while the day before, but I still hadn't mentioned the whole 'I *slept* with Lois' thing. I didn't really want to do that at all, but I knew I had to. It was going to be in person and somewhere she could yell at me without being interrupted. I'd have to tell her the whole story – maybe even play up the bit where, if the cabin had been much further away, I could have died. It didn't need much playing up – it was scary enough as it was – but if I could get her grateful to Lois first, it might help.
That bothered me. The idea that I had to censor – or felt I had to censor – what I told Lana. I should be able to tell her anything and everything and if she really loved and trusted me, it shouldn't matter if I slept in the same bed with another woman under extenuating circumstances.
He also mentioned in another passage (which I can't find) how much better he and Lois fit together when they were sleeping in the cabin than he and Lana ever did.
BUT I don't get the impression that all Clark and Lana ever did was make-out.
Clark said he missed having Lana as his BEST FRIEND in an earlier chapter.
Not just Lana my girlfriend or Lana the woman I planned on spending my life with, but Lana my *best* friend. The one person I'd always told everything to, except the Kryptonian stuff, of course. If I got into a fight with my parents, she was the one I'd turned to. If I did poorly on a test or when my essay came in third behind one with serious grammatical and spelling errors, she was the one I'd called.