SIL and MIL still calls my husbands ex girlfriend

I seen a Facebook post yesterday where my SIL posted a picture of her son n husband and my husbands ex- girlfriend responded and my SIL replied thanks sister in law..so my pregnancy brain went crazy I went on her page n she has photos of my husband and her son ALL over her page.. WTF.. petty..BTW my husbands family doesn’t like me... so many reasons including my last pregnancy I miscarried n the called me a baby killer!!!! I’m pregnant now 12 weeks.. and still no acknowledgement.. we have also been married for a year now