A Christian lady (a lady whose Lord is genuinely the Resurrected Jesus Christ - God in Human Form) will never dress in a way that is not modest.
This is because God the Holy Spirit lives in them and guides them to please Jesus Christ every day. Modesty (values of the Kingdom of God embodied in the Holy Spirit and exemplified by the Lord Jesus Christ) is living in a way that does not draw general negative attention towards oneself in a manner which causes people to doubt the sincerity & authenticity of one's testimony in Christ.
Going to chapel does not make one a Christian just as a bicycle in a garage doesn't turn the bicycle into a car.
Cheers
S. K. Fianko-Larbi