Guilt is the family currency. It's paid in sighs, in 'it's fine, don't worry about me', and in that one voice note that's just breathing.
Here's the truth: you can be grateful AND have limits. Both live in the same house. Gratitude doesn't mean unlimited access to your time, money or sleep.
Script for next time: 'I love you and I'm grateful. I still can't do this one.' Then stop talking. Silence is not rude. Silence is your seatbelt.