This is a bit of a rant tbh.
MIL is not very involved. We do not get on.
DH has a relationship with her. He drives up to his hometown, visits them etc. My relationship with SIL (who lives with MIL) has deteriorated over the years to the point that she has accused me of coming between her and DH. This is utter rubbish and the reason her relationship with DH has deteriorated is because she puts sod all effort in. Never phones, never visits, never bothers with DH children never sends a birthday card.
Today is his bday and neither his mum nor his sister have as most as sent a text or even written on his FB wall.
He sent them both flowers last year (I told him not to bother).
How the hell can you not wish your own child a happy Birthday?! 