Alright so I need opinions ladies. My husband and I got pregnant in May of 2015 and we miscarried, I…

Alright so I need opinions ladies. My husband and I got pregnant in May of 2015 and we miscarried, I got pregnant July 2015 with my current pregnancy... My husbands sister and I have never gotten along, she in quote told my husband "I love your daughter no matter who her mother is...- I find it funny how she "miscarried" and got pregnant right after... If she was really pregnant at all the first time" so needless to say, I don't like her and we exchanged words. Today she calls my husband offering to throw a baby shower for our second daughter that I'm pregnant with now and I declined right off the bat and my husband is really upset at me. I just can't get over what she said... This grudge is strong.