Why does MIL show no interest in our lives?

[pompompomy]

but goes on and on about SIL and her family. We had a rare phone call from her yesterday to find out what dd wants for her birthday. I started telling her about what we have been up to and she interrupts me to tell me all about SIL her dh her dc etc. then finishes the conversation knowing nothing about our dc and my dh (her son)! This happens every time we see or speak to her. It is really upsetting and also making us feel resentful of SIL so effecting that relationship as well.

Sorry pompom it hurts to see your DC basically rejected/made to feel second best - I can totally sympathise, my MIL is like this.

On her birthday all her DGC (our DC and SIL DC) made her birthday cards - she trilled on and on (and on) about my niece's card - DH actually had to point out (remind) her that our DC had made her cards as well - she quickly said 'oh yeah lovely' then went back to boasting about how great DN card was

Her favouritism is so obvious that our DC call her "DN's nana" not 'nana' or 'nana (insert surname)'

Mind my MIL said to me once that mothers look after their daughters and to not expect any help from her (in regards to our DC, you know her DGC!) - from that day on I just didn't bother making extra effort to include her in our lives anymore (it was always one sided anyway). We see her at Christmas/birthdays and we'll be seeing her on Sat for Mother's Day, oh joy...