[f4M] - forced to be the families breeding pet

I was thinking an RP where I am (and possibly I will play a sister as well, depending on the story and plot) turned into the family pet for their brother(s) and dad (don't really want mom in this one).

This would include ageplay obviously, but I also want it to include forced impregnation (even if it's not realistic for their ages, maybe we are forced fertility drugs to make it possible). Pet play is another big item I would like to include.

The more kinks, the better! Even unusual ones, for example maybe somehow you want to fully deny me pleasure?

If this sounds fun to you, let me know what ages you would be okay with me playing. And describe the scene/setting that sounds most fun to you! I prefer short but quicker replies.

If any of my other prompts sound interesting you can msg me about them too.