My sister liberty who is 19 about a month ago split up with her long term boyfriend when she told him she was pregnant. She asked me if she could come stay in my room as she hates being alone and needs some company. At first i thought Great we would have so much fun as we are so close then her morning sickness kicked in and it terrifies me as we have an en suite. Se understands my phobia and supports me but it still scares me. But i can't tell her to move out of my room as she needs me what shall i do?