It's been a long time ever since you seen Sans's face this close, of course you we're never completely in trust or felt comfortable with him due to the past, which is why his actually your 'Use to be abusive' ex husband for 5 years.

"Humm...hm...."

You suddenly got back together, he said he was desperate for another chance since he felt guilty for his old actions, and you did forgive him. Now his currently cooking in the kitchen.