Members of rose family?

Yes, as are cherries, apples, pears, plums, quince, raspberries and blackberries. Who knew a rose garden could be so delicious? :)

a vegetable not the rose family thats stupid

One must differentiate between marriage and sexual union. Marriage is a legal concept, and is regulated by laws and customs of societies. For example, in some states it is illegal for first cousins...

Nepotism.

depends. if there is children with in the house hold belonging to both parties of the case. if there is someone pregnant by the other party of the case. and if the two parties co- habitat the same...