Can my sister remove me from the property title of a house we bought jointly?

we bought the house in 2007 then when she got married in 2009 i was asked to move out. Her husband has another property which he rents out. He doesn't have a good credit rating. I just found out that she is going to declare bankruptcy and says that i should too. i'm a single parent living in my brothers basemenrt. Can she force me to go bankrupt or can i force her to sell the house. She's already stopped the automatic payments from her bank to the mortgage & utility people so i only have a couple of days to get this sorted. Also she says she has taken me off the title to the house. Can she do this without me being present or at least signing something?