Twinkie sleeps in bed with me and I have stairs at the end of the bed, just in case she has to potty during the night. She will do her thing and climb right back in bed. She is 7 months old now, so she has it down pat. When she first started sleeping the bed with me, she had 1 accident. It didn't take her long to figure out that going potty in the bed wasn't a good thing...
