@daCkudack I'd say telling someone they "aren't allowed to take [insert item] off" is pretty controlling, no matter how you look at it.
Of course, this isn't saying the relationship between He Tian and Mo Guan is completely toxic: I think it's interesting to watch it develop (and He Tian seems to care for Mo Guan, at least in some way), and in later chapters it does become healthier.
Mo Guan isn't someone He Tian can just boss around; Mo Guan is his own person and I think it's important for He Tian to respect that, at least to a certain extent.