I'm at a loss, have no idea how to tackle this one so please ladies, HELP!!

DD2 is 14.5 months old and very much a mummy's girl. I adore that trait, most of the time, but boy does it suck at bed time! She will not settle for anyone else but me. Not even DH. It's driving me nuts, especially on nights like tonight where I've been trying for 1.5 hrs to get her down and although DH has tried, she just screamed blue murder. This has been going on since about 10 months, maybe earlier.

DD2 was exclusively BF but with regular bottles of EBM, at least one feed a week, since the very early days. She's been drinking cows milk, in a bottle, since 12 months. She was fully weaned from BFing a few weeks after her first birthday.

So basically she won't take a bottle from anyone but me (and she refuses to take milk from a sippy cup from anyone!) and no one else can get her down without a MASSIVE very stressful fight. Oddly enough she'll happily give herself a bottle though but definitely not in her cot. We've tried that, several times, and once again she screams blue murder.

We have a wedding coming up and my parents will be watching our girls for the afternoon and night. I'm not taking DD2, that's just not an option. I'd prefer not to go than take her TBH. Mum and dad have witnessed her antics several times and assure me they'll just work with it but I'm still nervous about it. I hate knowing she'll be either miserable or overtired and wired (if she's up late) and that my parents will have a rough time with her.

Any suggestions? I adore her to bits and know it's just a phase but I desperately need her to be able to relax with others for sleep time. I'd also love a few date nights with DH!!