Advice on rude comments after pregnancy announcement

Hello all! I was hoping to get some constructive advice on my pregnancy announcement. My husband and i got pregnant really quickly with our daughter then had difficulty getting pregnant with our second child. We ended up going thru ivf and I am 7 weeks pregnant today and we are thrilled. I did not want to share any of the infertility journey with either of our families. I just wanted to keep it private. I feel people are more honest and won’t hold back if they don’t always know what’s happening in the background. Yes, and I know I put my feelings at risk by not disclosing what we were going thru when we were having trouble getting pregnant too.

Anyways, I think we will not be announcing until I absolutely have to. I have a lot of problems with my in laws not having boundaries. I anticipate rude comments like “how long did it take you” or “finally.” My mother in law asked me point blank “if I forgot how” (as in forgot how to get pregnant) back in July. I need some advice on how I should handle these rude questions. I had point blank told my mom it was non of her business when she asked about baby number 2 but I can’t say that to my in laws. There has been some tension between me and my husband over my opinion of my in laws. He is very close to his family (which I respect but feel needs a little more separation and respect on my opinion over my mother in laws opinion). I would really appreciate some constructive feedback/comments on how I should handle these questions. I really appreciate it!