Wife's best friend moved in 6 months ago and I'm becoming attracted to her?

Anonymous
I've been married for almost 10 years. 2 years ago we separated for several months and she moved out of state. I followed her and ended up getting a great job so she came back to me. Now we're setup in a huge 5 bedroom house with an ocean view and life is good. Then her best friend, who was also going through a divorce at the same time, finished her divorce and needed to move in since we had room to spare. So, now we've lived the past 6 months with 3 adults and 6 kids total (4 ours, 2 hers) in an ever-bonding family unit. I was not in favor of her moving in, but she literally would be out on the streets and lose her kids to her terrible ex-husband (long story). Everything is going fine. I'm happily married and our relationship is rebounding from the near divorce, slowly. I'm attracted to my wife and we have a great sex life. But, from the day she moved in, there's been a running joke that she's a sister-wife and how we have all the benefits of a plural marriage! Um, well, that's great, but not all. What about mine? OK, now before you run and label me a selfish jackass, I haven't technically done anything wrong! I've never flirted or been inappropriate or "joked" about fantasies, or whatever techniques someone in my position would use to instigate a threesome. There's no reason to think her gorgeous best friend is even attracted to me. She goes out a little and has a light dating sex life, but isn't looking to get married any time soon. She's just happy soaking up the free room and board until the wheels fall off! She's a great roommate, very respectful, and very helpful around the house. So, I'm feeling like a chump, paying her family's rent AND food while she goes back to school and rebuilds her life. Also, this was all my wonderful wife's generosity. I never wanted her here in the first place, but I'm really growing closer to her and her kids! OK, so then you say, "Poor baby, you live with two beautiful women who treat you well and live in paradise! Either get over it or kick her out!" That's what keeps going through my mind, but she really does have a hard-luck story, she's starting college now, and it's within my means to help her, so it's hard to kick her out. But, she's a really cool chick and possibly one of the hottest women around! I'm not falling in love with her or anything because I intentionally don't flirt or talk to her, but how long will she be here? How do I get her out? I'm not her dad, or her husband, but she's co-dependent and will likely stay for a while. So, this situation is only gonna get worse. I haven't brought this up to either of them. Should I? I can't just keep suffering alone. I'm a happily married man that wants to have sex with his wife's best friend! Everything is going perfectly for them. But, I'm struggling and will break at some point and do something stupid. What should I do?
Wife's best friend moved in 6 months ago and I'm becoming attracted to her?
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