Toxic in laws.. in Life Lessons

Does anyone have tips on dealing with a toxic mother in law and sister in law?
My mother in law barely speaks to me, never checks on me if she heard I’m sick, always ignores me, and is always pestering me to give her a grand baby (she knows I have health problems that could get worse with birth, but says she don’t care as long as she gets a grand baby)… she always gets upset at me over stuff that’s not my fault (like if we can’t go visit them because I got sick)… she tells my husband all the time that I’m just faking all my health problems…
She acts like she can’t talk to me, she’ll text my husband and tell him that she wants me to make a dessert and bring to family holidays (but refuses to text and ask me)… she will ask me about things in our life and if I give her an answer she don’t like she will just ask my husband the same thing, while I’m sitting right there…
My sister in law is a complete pill (gets it from her mom 100%) she goes through phases, one week she wants to be my BFF, next she’s ignoring me and being snobby… she also is weirdly infatuated with my husband… tells me how she’s upset she couldn’t marry him, tells everyone how cute and sexy he is… which makes life super awkward… and she came up with a nickname that I hate.. and refuses to call me by my name.. so much that my mother in law has forgotten my real name on multiple occasions…
My father in law has no problems, he knows that they act this way but him and my husband both claim trying to fix it will only make matters worse…
It’s making me re think my decision on having kids (which I’ve really wanted my whole life) just because my MIL and SIL will be in their life…
My husband doesn’t want to say anything, says it will make it worse, but he also still makes me go visit them, and invites them to come here (which they hardly ever do) so idk what to do… I feel like if I tried to say something it would make things way worse… but I can’t live like this anymore…