Is this creepy or am I just overthinking it? Please need honest opinion ?

Is it weird that when I FaceTime the guy I’m dating long distances, we were joking about my little sister and I turn the camera onto her and he stared and was laughing then when I turn it back he said “you know your sister has pretty long hair” I said I know and he said “but I really like it”. My sister is 9, is it weird or normal and I’m overreacting? There’s been times me and him have sext over FaceTime and since my house is getting redone theres really no privacy, so a few times me and him start getting heated then my little sister walks in and we both stop what we are doing but I don’t know if he leaves his hand on his côck and then I’ll say Hi Sky to my sister and he would go “Hiii Skylaaa”. Sometimes he can say certain dirty things but low when I’m around my family. But I know he’s worked in a daycare used to change diapers, he’s around kids he love kids and kids love him and he’s a big kid himself