You definitely need a solicitor. In the States, they are called Estate Attorneys but no matter. My late husband and I set up living trusts for each of us that mirrored the other’s directives. We both have stepchildren and grandchildren and wrote the breakdown that each gets upon my death. Maybe the difference here is that we worked it out together. We were married for 37 years. We worked and saved together and agreed that all our assets would come to me. I’ve chosen to be as generous as I can afford to be with all of them while I am still living. Be strong and don’t settle for less. It’s hard to stand up for yourself sometimes. Do it anyway. A solicitor may be able to make a more equitable division leaving the assets to you, say in a trust, to be shared only after your death. Sorry for prattling along here, but I’m going through the estate stuff, too. Blessings.