My husband is Indian and I am South American. We live in Europe and we deal well with our cultural differences, we talk and reach consensus most of the time.
It turns out that my husband's sister-in-law is a very invasive person (personal questions etc), she adds me to the family's WhatsApp group without asking if I wanted to (only for her show off) when I don't like that kind of thing and etc. We don't know each other personally yet. She asked her 10-year-old daughter to get my contact details (I really like children, so sometimes we played, nowadays no, a bit about sending stickers and such).
Not to mention the drama and the need to be praised. I feel choked up because I don't mean to be rude but it's disgusting how much personal content she sends, whether it's a dance or when she passed some exam, all this without me sending a message like hi or asking something.
My husband just said she has this character and told me to answer the minimum possible, that's what I am already doing. I've also already explained I am not used to sharing my accomplishments or what I am doing every step and such, and that I have learned in life we are the main stakeholders, I also already said that I'm not a heavy Whatsapp user. I even left the group, giving the excuse (very bad) that my smartphone was slow, so she started flooding me with direct messages, photos, and videos and even insistently asking if I saw it, almost forcing.
It's a surprise because she is a psychologist, she also lives in Europe. The impression I have is that she wants to create competition. Because a few times, around 3 years ago, I used to share the development of my baby in that group, about once a month. She took that as an opportunity to make comparisons with her baby who is the same age as mine. All that I have said nothing worked out.
How can I tell her I don't like her sending me each step of what she is doing, without creating a bad mood in the family?