You know, sometimes getting spiritual discussion on books, getting this debate to decide whether something is allowed or not according to certain paragraph or sentence is
useless. The problem with this, is that in the 21st century almost everyone is aware of the textual contradictions the Bible, or even other holy books may have. I repeat it, TEXTUAL.
My point is that you should notice that what is written in the holy books is totally anachronic, and therefore, what is said must be interpretated, not taken as something real in this time. Remember that most of the times, the important books through history have been important due to the multiple lectures that you can give to that text, and not related to a holy inspiration that must be followed in a fixed way. As a result, the Bible may be as important today as it was 9 centuries ago, but you should be careful with the ideas written. They are not there to be taken textually, just as spirituality and even human mind are not unidirectional. It's an spiritual book, it should be seen with soul eyes.
Considering all of this, you can state that you are deformed as long as you feel that what you do is deformed, but your sister cannot tell you that. Now, if we talk about psychological issues, let me tell you that your sister is close to have a lot of internal complexes. Believe me, if she was quite good with herself, she wouldn't be looking aside and trying to point out the others' issues (issues as something neutral, not as a problem). She wouldn't give a shit about gay people if she was totally ok. Don't take the discussion to something as subjective as the interpretation of books. Ask her if she has a non-religious problem with gays. I'm sure she'll take a lot of time to answer that.