Break Up & Divorce

My Ex’s Sister keeping contacting me?

My ex and I broke up awhile back. His whole family hates me because it didn’t work out. My ex was very disrespectful, pushed all my boundaries and we argued over the smallest things everyday. Of course I went no contact and blocked him on everything. Me and his sister was very close during our relationship and now that it’s over I really don’t want nothing to do with the toxic family. I don’t understand why his sister wants to talk to me if the whole family hates me. His sister keeps texting me, asking for advice, causal things etc. How do I tell her that we shouldn’t be talking anymore, without sounding mean?
My Ex’s Sister keeping contacting me?
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