Bobby Kristina And Adopted Brother Planning To Wed?

A few months ago these two were calling themselves brother and sister on twitter, but there relationship has totally changed.

Now there are reports they are planning to elope and get married, after finally going public with their relationship.

Bobbi's grandmother, Cissy Houston, does not approve of the relationship, calling it 'incestuous', but the young couple don't care what anymore thinks. Bobbi is already rocking an engagement ring....