It is the Lord Christ you are serving.

What you do in your house is worth as much as if you did it up in heaven for our Lord God.

We should accustom ourselves to think of our position and work
as sacred and well-pleasing to God,
not on account of the position and work,
but on account of the word and faith
from which the obedience and the work flow.

- Martin Luther

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Colossians 3:23-24
23Whatever you do, work at it with all your heart, as working for the Lord, not for men,
24since you know that you will receive an inheritance from the Lord as a reward.
It is the Lord Christ you are serving.