As your "father" tried to resist and was ultimately subdued by the alien army before you, you were about to step in and try to save him, but then you saw your alien dinosaur sister (Lucy, if alien dinosaurs were allowed names) give you a wink, and suddenly understood.
"No point fighting you all I suppose", you muttered. Dinosaurs couldn't speak English, but since you were actually an alien you supposed that was a moot point. "I surrender!"
"Wise choice", said your mother.
As the alien nazis loaded your now-unconscious female alien dinosaur father onto a prison spaceship, they lead you onto the ship as well.
"Don't worry, I can get us out of here", whispered a voice in your ear. You nodded subtly before being shuffled into a huge cell.
Only a few hours later when your cell was torn open and you gasped at the colossal figure stood in the gaping hole in the wall.
"Miss me?" she said playfully.
Standing at around fifty feet tall, Lucy had regained a mostly humanoid form, though her legs, tail, wings, teeth and parts of her skin were still those of her Charibidos form. A pair of insectoid antennae stuck out from her much longer, wilder hair, now down to her still-dinosaur-esque heels (so not quite to the ground). She also had two pairs of arms, large batlike ears and plates along her back rather like a stegosaurus.
(She was also stark naked, but that was a sidenote as she was your sister)
"Wh-wha-What happened to..."
"Well, seeing as how I joined so willingly, Mum took me to meet space Hitler, but I used my eye-lasers and disintegrated him", she said like this was a fairly normal story. "She wasn't happy about that and attacked me -actually she almost tore my throat out, but I kicked her off me into some kind of energy wall and ran for it, then while I was running I saw they had made a new Genetic Accelerator Twister - seriously, can we not abbrieviate that or something? - and I MAY have accidentally on purpose combined my DNA with an additional source or twenty and then I flew off to rescue you and Dad!"
You tried to process all this as Lucy tore another hole in the prison ship - it had been landed on another planet of some kind - and pulled out your unconscious father, still a female alien dinosaur