Loki led Darcy in and nodded to Ellen, before looking at Sif with a fond smile. He nodded to her as well, more of a formal gesture, and definitely not inclining his head down to look at the expanse of bared legs she was displaying for all to see. He'd only ever seen Sif in armor, so this was definitely...different. Different was a good word for that. It might also qualify as different that Loki was still staring for longer than necessary.
After a faint cough, Loki smiled over at Darcy and then turned his full attention to Sam. If all else failed, Frigga instilled excellent manners upon her youngest son, adopted or not, and Loki could be incredibly polite when he put his mind to it.
"What a pleasure it is to meet you both." He held out the bottle to Sam. "For you. In return for your hospitality. I was told it is an excellent vintage."