erm.
Love, if you're serious - and I hope you're not - you need to grow up.
His mum tied his tie - ok, nobody over the age of 10 needs their mum to tie their tie! but even so, what on earth is your problem?
And she tied his tie without asking you?
asking you?
sorry, but that is so funny.
her - "Future dil, may I tie my son's tie please?"
you - "yes, just this once. Husband-to-be, stand still for mummy while she ties your tie and then you can have a wowwy-pop."
Neither you nor his mother own this man. He is a fully functioning independent adult, I assume. This is not a tug of war. This is not a battle you have to 'win'. There is room for you and his mother in his life.
How would you like it if he wanted to shove your mum or your dad aside? Set himself up in competition with them? Expected you to cast them aside to make him the only one in your life?
That'd be pretty stupid and childish of him, wouldn't it.
Therefore...