Some family tree's have so many branches they need a ribbon cutting Ceremony

What do you call a family tree that has been pruned?  A divorce

There are some people who insist that my sister belongs in their tree. I know it is my sister as they have our dads name and correct y.o.b. and they have our mums name. Unfortunately they have the wrong p.o.b. for my sister and no y.o.b. but they have given her a spouse b in 1723 and a daughter b in 1747 and they fail to see how utterly ludicrous it is. Or is it just me that thinks it is ludicrous?

Huia.