Dealing with in law!

How to you all deal with in law whom likes to interfere much? When I have arrange photoshoot for my LO during his 1 year old. But I get such negative comment from my mil saying I waste money and it is not necessary. I told her it is just memories for my LO as I regretted not taking it during new born time. Yet she kept saying not necessary, I already gave up replying to her. I have even speak to my husband to tell her not to interfere what am I doing. Yet again, everything I does she likes to interfere and comment unnecessary things! I cannot stand staying with her