That's really quite larking Hun for a 6 year old to be saying these things let alone having a plan. What's her dad like? Mentally stable? I'd be questioning him and working together to find out what's going on. Most times kids have picked up on what one parent has said. Maybe he's said a few things to her in passing and she's flown with it thinking she's a burden to you both. It is especially alarming with him picking her up today and saying to her 'mummy's cross with me'. She's a kid and doesn't need to know these things, he should be promoting a positive relationship with you.what else is he saying to her? Separated or not you guys are still both her parents and need to be a united front with regard to your relationship. Good luck Hun, you sound like you are doing and saying all the right things.xo