O_O scary

wow that was scary….i was just putting Liam to bed and i heard the front-door open and i shouted out hello bob but i didn’t get nothing back so i sent him a text telling him to get upstairs (to say hello to Liam ) but got a text back saying he was at his mums…..so who opened the door (O_O). bob told me to have a look around but i see no-one. back door was unlocked and i no i locked it so ive locked it again. i wonder if someone thought we was not home because the tv is off and when they heard my voice i scared them? going to ring up the police tomorrow because something is not right.