Tj303 J

My husband and I are joint owners on our home. I was put on the deeds in 1997. I paid for the removal of his first wife and for my name to be added to the deeds when she agreed a settlement. About 11 years ago my inlaws were altering their will and they got their solicitors to come out to the house, draw up documents for their adjusted will and also make an application to put my husband on the deeds to their home as 1/3 owner. Upon one the death of one of his parents the spouse Inherited the deceased share but then upon the death of the remaining spouse my husband Inherited the other 2/3rd of the property. We still own our original home and it is our main residence with our son living in the Inherited property. We are looking to sell bot properties in time. Where do we stand on CGT? I'm trying to find out but it looks like a minefield.