How would the Reaper, Ink, Error, Fresh, SF and UF Sans's react to waking up next to their S/O for the first time?
He’s just staring at you, completely amazed at how you’re still alive. Wait, you’re still alive right? He checks your breathing and sighs in relief. Assuming that he’s fully clothed, he just pulls you close and listens to your breathing.
Ink can’t stop grinning. You look so perfect, so peaceful, that he grabs his notebook and sketches your sleeping form until you wake up. He shows you the picture and it’s a masterpiece.
He’s wondering how you got close to him in the first place. Error is honestly freaked out because he does not like anyone in his personal space so he moves as far away from you as possible. When you wake up, he lectures you to respect his space.
Literally, Fresh doesn’t have emotions. He has no reaction.
Black is smiling and takes a picture to tease you later. But really though, he’s happy that you trust him enough to not attack you in your sleep. He has to get to work, but he lays there for a few more minutes than usual because of how relaxed he is.
Holy shit, Red doesn’t want to move. He’s afraid that he might accidentally wake you up and this moment will be over forever. He watches over you to make sure that you’re comfortable and slowly brings himself closer to you, nuzzling your neck. He soon falls asleep again.