The key words are "In fear of your life."
You don't even need to be in fear of your life in Texas
"PC §9.31. SELF-DEFENSE. (a) Except as provided in Subsection (b), a person
is justified in using force against another when and to the degree the actor
reasonably believes the force is immediately necessary to protect the actor
against the other’s use or attempted use of unlawful force. The actor’s belief
that the force was immediately necessary as described by this subsection is
presumed to be reasonable if the actor:
(1) knew or had reason to believe that the person against whom the force was
used:
(A) unlawfully and with force entered, or was attempting to enter unlawfully
and with force, the actor’s occupied habitation, vehicle, or place of business
or employment;
(B) unlawfully and with force removed, or was attempting to remove
unlawfully and with force, the actor from the actor’s habitation, vehicle, or
place of business or employment; or
(C) was committing or attempting to commit aggravated kidnapping, murder,
sexual assault, aggravated sexual assault, robbery, or aggravated robbery;
(2) did not provoke the person against whom the force was used; and
(3) was not otherwise engaged in criminal activity, other than a Class C
misdemeanor that is a violation of a law or ordinance regulating traffic at the
time the force was used."
Nowhere is the use of a weapon mentioned.