sneaking him in

so i have snuck a boy in many times before but my family has always been gone. well i want to sneak this boy in but the only thing is my moms bf is gonna be here cause he can’t go back to work for a month cause of a surgery. he never comes in my room or bothers met. i jus need to get the boy past him. yes ik it’s not the best thing to do but live life to the fullest and have fun right. any tips?