Wedding thank you cards +baby announcement

Hi everyone! My husband and I got married last month and are putting together our thank you cards. Not so much thank you for the gifts but thank you for spending our special day with us. Because we had such a small guest list (like 30 people) we also want to incorporate a small baby announcement. We are not asking for gifts in any way shape or form but when Googling it there's a lot of comments on how tacky it is because it makes it seem like you are saying "hey thanks for the wedding gifts also be ready to buy as baby presents" and we are not asking for that at all.

Im going to write personalized notes for each card and add a nice size photo of me and my husband. How should I add a baby announcement photo that we secretly took at the wedding? Should I make a photo collage at all? Please no rude comments. This is what we have decided. We just need advice on how to make it flow and not seem tacky.!