I am 29 years old, and I fast regularly on Mondays and Thursdays. My father wants me to limit it to one day only, but I am able to cope with fasting. If I go against his wishes, am I being disobedient to him?

Praise
be to Allah

If the situation
is as you describe, then you are not being disobedient to your father by
going against him when he tells you not to fast on both Monday and Thursday,
because your fasting two days is an act of worship, so long as you are able
to do that, and there is no obedience to any created being if it involves
disobedience towards Allah. Moreover, what appears to be the case is that he
is trying to be kind to you and is not forcing you not to fast.

And Allah is the
source of strength. May Allah send blessings and peace upon our Prophet
Mohammed and his family and companions. End quote.

And Allah knows
best.