My SIL is getting married; she and her FI are Pentecostal. I was planning on wearing a black asymmetrical dress (shortest part is just above the knees) that has thick tank straps. SIL is crazy and not forthcoming with information about the wedding so I refuse to ask her what I should wear. Do you think think this dress would be ok to wear? I don't care if SIL approves but I do want to be respectful of what I wear in the church.