Would you be upset?

My boyfriend and I have a 6 month old together and don’t live together officially yet but he stays at my house a lot. Well he was with someone else for 11 years and has a 9 year old with her. He brought over a box of cd’s and a couple of other random things in the box which one thing was a whole thing of pictures of him and his ex. None of the kids just of them. Him and I have not had the beat relationship for awhile now but in those pictures he looks genuinely happy. He has never looked like that with me. Well now those pictures are upstairs in my house being stored. Is that weird or am I overreacting?