Suspicious of my husband and sister
This is my first time on a forum so, I apologize about my post if it's too lengthy. I just would like some unbiased advice from others I don't know personally instead of family and friends.
My title says it all. I am very suspicious of my husband and sister. I am 31. My husband is 35 and we have been married for one year. No kids yet. Just some background history, when I first met my husband 4 years ago, he was a bachelor. He had a house that he was buying, which is almost paid for at his young age and he was everything I wanted. It was as if he realized that I was the one for him and he let all of the other girls go and committed to me. I know he loves me and I love him. He is kind and he cares for me. We havent had any problems up until now.
So this summer, I decided that it would be okay for my younger sister who is 23 (she is adopted into my family). I decided that she should spend the summer with us. I like to have her around so that I can teach her things and be a big sister to her because she had some struggles. Nothing serious but she had a hard time finding herself but is now becoming a hair stylist which she is very good at.(I had to talk my husband into it as he wanted it to be time for only us) He agreed reluctantly.
So my problem is this. I work during the day and my husband is home and works his own hours and visits his office whenever he needs to. He has that privledge. I noticed that they have become very friendly toward one another and I do not like it. My sister is very flirty with his friends, around men period and sometimes their wives or girlfriends look at her like she's being too flirty. I told her about this and she said it wasnt her fault the women were insecure. and she sometimes dresses to show off her rather toned but curvy body. I am physically fit as well but its uncomfortable for me around my husband. He and I were in the jacuzzi and she came in with just a skimpy bikini and my husband, a natural man of course attempted to avert his eyes. I watch everything. They went out to lunch the other day and didnt even let me know which I thought was weird. He acted like he didnt want her there at first. What takes the cake is, I called my hubbys cell during lunch. No answer. I called her phone. No answer. I called the home phone and he answered after several rings and was breathing heavily. I asked what he was doing and he said he was out running and heard the phone when he came back in. He said my sister wasn't there. I came home that evening and my sister was gone but I noticed under my bed, a pair of thongs. They were her's because we visited a lingerie store and I know she got them. My sister has always said she loved my bed because it's so plush, in the past. I swear I can smell her perfume on my bed. Hope I'm being paranoid.They have been acting normal but I am so confused. I feel very paranoid but I dont want to ask and then nothing happened. That would make me the bad guy. I am bi-racial, my husband is white and my adopted sister is from Barbados. I am no racist but I didnt even think he would be into that so it's surprising because he seems very attracted to her. I hate to sound paranoid but I have that women instinct.
If something happened, I dont know what I would do. I would blame my sister for putting him in this situation and him for being such a low life cheater. My husband is acting sort of off and my sister is acting somewhat normal. How do I confront this situation?