PLEASE HELP ME - sister’s wedding embarrassment

[Confusedandhurt9]

I am originally Indian. I am divorced. My sister is marrying her fiancée in India next year. I am dating a man for 3 years now and I invited his mother to the wedding. My sister invited her friend to my wedding and I didn’t care. She now isn’t talking to me and said that my bf’s mom can’t come because they don’t know her. My parents are paying for this wedding and my sister isn’t paying a penny, nor is her fiancée. I cannot uninvite my bf’s mother as that’s rude and I’m really not keen to shake our relationship like this. What do I do? I was thinking of scaring her away with stories of dengue fever instead and I know that sounds ridiculous. She’s old and may not want to take the risk. I can’t tell her the truth and actually I’m shocked my sister would be so cruel and weird. Her fiancée messaged me saying the mom can’t come.

Your own parents need to step in here. If she is to be your future mother in law I'm sure your parents would not accept the shame of your sister uninviting her. They can add her to their guest list if it makes your sister feel better.
She's having a bridezilla moment for sure

How come the fiance gets to speak if his not paying and ur parent's are , honestly i hate this i can already tell ur sister's going to be husband is gona put obstacles around u which is a major red flag , i would suggest u speak to ur boyfriend and his mom tell them the situation or ask ur parent's since they are paying for wedding, or if its deep say either my bf mother comes or i dont come at all..