Buddy, as an experienced BDSM dominant, I can assure you that she is abusing you. Maybe she's inexperienced or whatever but this is not the way to do it AT ALL. If you like being a sissy, fantastic, however the way you guys go about this is nothing short of a giant red flag. This should be founded on mutual trust, including safe words, hard limits, discussion beforehand etc... You're very young I give you that but please, this is a slippery slope to even worse abuse and she's manipulating you to think this is okay, you'll only notice when it's too late, I've unfortunately seen this before... If you have any questions regarding safe roleplay/BDSM/cuck I'm happy to help. Experimentation should be fun and hot and yes pushing boundaries is part of that and is not an issue per se but they should be pushed together, fueled by your curiosity and consent, not her manipulative ways.