So aunty Mila and aunty Bree x3

So there's a family reunion for Rain at the Cimarron herd and Bree and her adopted brother Thunder turns up with his new mate Mila and so that makes Mila Rains adopted aunt. So here's the script of the scene and why Bree and Mila look so disapproving
Rain cantered around, her family had come to visit her in her new herd and she spotted her aunty Bree and her uncle Thunder and an odd appaloosa mare. Rain trotted over,
Hi aunty Bree! Who are you? Rain looked at the mare through piercing blue eyes. Mila looked slightly shocked and slightly offended that she had not been heard off she hesitated before replying
I'm Mila. Aunty Mila to you Mila said with a warm smile towards Rain. However, Rain was unsure of this
I've never met you before how are you my aunty? Rain asked quizzically Bree quickly stepped in she broke the tension
Rain, uncle Thunder finally found his other half in Mila just like you did in Spirit and so she is your aunty. Bree said smiling at Rain.
Oh, ok Rain paused she looked like she had more on her mind that she needed to say
Anything you want to say? Mila asked flashing a quick smile towards Rain
Well... Rain said she trailed off though looking like she wasn't sure where to start
Well? Bree asked impatiently
Well I'm pregnant. Rain replied. Bree and Mila looked at eachother in a way which said she's to young. Mila had already had a foal and two mates but that was behind her and she was not going to admit that as she didn't want Thunder to know as he would most likely get jealous.
So that's the scene and why Bree and Mila look so disapproving
Bree (c) Val
Mila (c) Beth
Rain (c) DreamWorks
Story and render (c) me