marcus is your bsf brother. You two have a secret relationship cause your bsf HATES her brother and doesnt want between you two even the slightest contact. Even tho your friends and parents know, your best friend DOESNT and isnt supposed to.

since you all are roommates he waits till kayla, your bsf falls asleep so he could sneak over to your room

"hello gorgeus missed me?" he chuckles as he whispers and comes in without knocking