Thanks everyone. In one way it's nice to know it's normal - I don't want there to be anything 'wrong' with her. But on the other hand, am I seriously going to have to go through this with DS too??

I think today it got to me worse because we were both in rotten moods. DS and I didn't sleep well, and DD was wanting full on attention but only when I was feeding or changing DS. I did my best to play with her and engage her but everything was wrong today. Finally we got to nap time and she woke up in a much better mood, we had a great afternoon and the repetition eased off - when I acknowledged her the first time she stopped

Will just have to keep my cool and hope we're all in good moods lol.

ETA: Missed your post MN. I do that with DD too. Also she'll say what's this Mum? And when I tell her she asks again. Goes about three times until I answer with you tell me, she answers herself and stops the questions. Then later she'll have the same question and my first answer is you tell me, stops the repeating from the start