Hi my partner and I have been together 9 years we now have two children and live a wonderful life together but before us my partner had another child him and the mother both being very young with the pressure of a new baby they split but she refused contact straight away so my partner persisted to make contact eventually when the child was around 2 and the ex was newly single she simply left the child with us for a weekend which I found strange as we were strangers but my partner was happy this contact continued a few months but then abruptly stopped with no reason for it. Years passed my partner trying to make contact sometimes faced with a wall of silence sometimes it would go as far as making arrangements for them to be ignored last minute, my partner has persistently tried to make contact but always been reluctant to go down the legal route as he felt it would create a bigger issue And be an unpleasant experience for the child specially as he was never named on the birth certificate. Our dd is now aware and would like to meet her half sibling also, as a mother I don’t understand refusing contact when the other parent is genuinely trying to make contact and co parent civilly any suggestions on what to do next?