I recently discovered I shared a DNA match with a lady of 341cMs of whom I don’t know. I’ve since made contact with her and some missing gaps discovered. She has a half sibling (1972cm) - brother , (Same mother ) but this person shows up as a 48cM match to me. - very distant. Can there be any explanation ? I’ve established it’s my paternal grand mother side it’s all linked too. The lady that’s the match is in her 60s , my g- mother is deceased - 92 years. I’m confused as ages differ here - what link could it be ?