We are ttc#2 but we don't want our family to know.

Ever since we met, both our families have put pressure on us to have babies. We had our daughter before marriage and everyone found out right away. Now married, we are trying for #2 but i don't want to tell them. They are all the touchy Feely type and want to give me advice all the time. I know they mean well, but it just really bothers me. I would rather tell them about 5 months into pregnancy. Any thought? Is this too late? Am I just being "mean" about it? What are your experiences? I guess, I just want to keep my body to my husband and myself. Do you ever feel this way?