rel.dot

digraph P {
        a[label="A: 40歲,男 \"我\""];
        b[label="B: 20歲,女"];
        c[label="C: B之母, 推測為AF之婚生子女"];
        d[label="D: A與B之子, 0歲"];
        e[label="E: A之父, 60歲"];
        f[label="F: A之母, 推測60歲"];
        g[label="G: E的哥哥, 推測60歲"];

        { rank = same; a; c; }
        { rank = same; e; g; f; }

        a -> b [label="戀人", dir=none, style=dotted];
        a -> b [label="父女"];
        c -> b [label="母女"];
        a -> c [label="初戀", dir=none, style=dotted];
        a -> d [label="父子"];
        b -> d [label="母子"];
        e -> a [label="父子"];
        e -> c [label="夫妻", style=dashed, dir=none];
        f -> a [label="母子"];
        e -> g [label="兄弟", dir=none];
        f -> g [label="夫妻", dir=none, style=dashed];
        f -> c [label="母女"];
        g -> c [label="父女"];
}