DD2 is 2.5.
She's potty trained during the day and has been for about 4/5 weeks and she's been great. No accidents etc.
Anyway in the morning, first thing before I'm even aware she's awake, she is getting out of bed, taking her nappy off and has weed either on her bed, her sisters, on on the floor.
I've explained why she mustn't do this, let her see me have to strip beds, air mattresses etc etc. She says 'sorry' and says she won't take her nappy off again etc but next morning it's the same thing.
So last night I put a potty in her room with her. I wasn't at all sure about doing this as thought DD1 might want to see what was in it (DD1 is 6 but with SN's) and DD2 would try to stop her and there would be an 'accident' with a full potty!
When I went in a 7am it had been used and no beds were wet.
Is this the right thing to do though? What do you think and what are the alternatives?