Have recently had DD2 (12 weeks) and DD1 (3.8) has been pretty good so far..however I fear we may be experienecing delayed fallout. It started with early waking, usually because the baby woke her up (but then went back to sleep) which has been as early as 4.45 this week. She flatly refuses to go back to bed or even play in her room as she used now, now wakes us and baby, plays loudly outside bedroom , cries or eats toothpaste or whatever for attention. Now we also have hitting, biting, kicking (us, not baby) and also weeing on the floor for attention. Yesterday she also lied to me, said she wanted to play in her room and went up and shook the baby to wake her.
I am usually quite calm and objective but a) sleep depriviation b) husband tyring to be 'strict' and therefore constant conflict and c) we have a great relationship with clear boundaries and I'm quite upset by my friendly litle girl being all deceitful and spiteful.
Perspective, and advice needed please!