So its the beginning of the work week. You are busy. Keep those little romantic touches coming.
Whisper in your partners ear that they look stunning as they get ready for work. Tell them you are jealous of their work mates who get to spend time with such an amazing person.
Put note in their lunch box if they have one. Or text or call in the lunch break to tell them you had a great weekend with them and are missing their smile (put in here what is appropriate for you) and are looking forward to that first kiss when you get home.