You say that this man prays before every meal....prays that his relationship with your sister is a good one, right? But is his LIFE evidence of his apparent prayerfulness? You and she have the answers. Look at his LIFE! And I don't mean his mistakes or the things that he may have once done....what is he doing now? Do you know that he was once something very different? Is he contrite? Is he active in his SERVICE to God? You know sincerity when you see it, right?
And is your sister praying? Has she had men in her life before that even tried to think about God - in the way that this brother is? At least he's praying. How many brothers have we known that only reference God when he's looking at your butt or praisin the sex he's gettin at the time?
If she doesn't feel like she can rely on her own discernment, has SHE prayed and asked God? He is not a God of confusion and He will make His presence known.
Brown, God ANSWERS prayer! And if you've prayed and believed, your prayers are answered and your life is changed! I KNOW what I'm talkin' about.....not because I've seen it, but because I've lived it! (I'm trying hard not to make this post into a testimony....don't wanna get too preachy)