I've known about this A for 3 years, but I just found out the details this week after forcing them out from my H. I don't even know if it's all out of the bag.
It all started when I was 6 weeks pg with my first child. My mom was leaving on vacation with her BF and needed someone to stay with my sister. She is only 2 years younger than me, but she has mental problems. Like anxiety, depression, etc. so my mom doesn't like leaving her alone. My H and I told her we'd stay over till she came back. Later that night my H and my sister took alot of LSD, something we used to do often, but I didn't take any cause I was pg. I fell asleep @2am cause I couldn't stay up any longer and when I fell asleep my sister removed all her clothes and seduced my H.
Now, I found out because I woke up an hour or two later and just felt something wrong. I went into her bedroom and it was completely dark and I turned on the lights to see her naked in bed, but my H was sitting at the opposite side of the room. He looked angry and confused. At first, I didn't snap cause my sister is kinda crazy anyway and to top it off she was tripping. So, I went over to her and told her to put her clothes on and left the room. It was my H who came after me and told me right away "nothing happened". That told me something DID happen and I went off as any normal pg woman would do. Okay, that's how it all started.
Fast foward to present day. I stayed with my H because I was pg and when our D was only 5 months old I got pg again. All this time we still hang out with my sister and we're all friends again, but I just FELT something wrong. When my 2nd D was 5 months old I got pg AGAIN. Which right now I am 7 months pg with our 3rd child. I wanted to keep going with our family and just forget what happened in the past. But, all the time it just FELT wrong.
I finally confronted my H about these wrong feelings this week and he spilled it all. Supposedly. Now, his story is he has been in love with my sister since the first time he met her. She never gave him a chance so he went for me and fell in love with me and married me, etc. That night that it happened he says he couldn't resist cause she was finally loving him back and he was happy at first. But, then he says he was trying to make love to her and she was being really aggressive and crazy and that was turning him off. Then he says he stopped cause he felt bad that his pg wife was sleeping in the next room. Yet, he still ejaculated!
Now, he's torn cause he is still in love with my sister and wants to be with her, BUT he loves he too and his kids and doesn't want to tear our family apart. After he heard what I had to say - which is I'm a Christian woman and don't believe in divorce, and I'm still very much in love with him, I take our marriage vows very seriously - he claims he's willing to patch up our marriage and forget all about my sister.
Now, my question is what do I do about my sister? Dr. Harley says we need to break off all communication with her, but I'm scared. First, because my mom will want to know why and then will probably blame my H and second because my sister has no other friends and if we do this I'm afraid she will commit sucicide or something crazy.
I'd prefer this question to be answered by Dr. Harley himself, but I don't know where to go. If anyone has any feedback please help! If not, it was just a relief to get this all off my chest. I'll be posting this in the prayer requests cause I believe prayer is very powerful. If you pray, please pray for my family. I feel so lost. Thank you.

Yikes, it does sound like a Jerry S. moment. Is your sister getting any kind of medical treatment? She should be getting some help. Maybe you can use this to urge her to get it.

And she definitely does not need to be using any LSD.

How is the marriage otherwise?

No, my sister isn't on any medication. That's a good idea actually. Maybe she will seek help.
The marriage otherwise is still going good. He really wants to save our marriage and I do too. I hope we can be happy again.

Hi lcg_25

As long as your H and your sis keep using drugs, this is going to be very hard to recover.

MB principles doesn't apply much with addictions of that kind.

Your first step would be leaving out those. You have to got a clean mind to start dealing with the rollercoaster that is recovery. Meanwhile they keep using drugs, they are going to relapse most likely.

I think you all 3 need to go to a counselor and to NA.

Once you find out why you use the drugs, and fix that problem, you can go ahead in the rest of your problems. But you can not keep covering them with drugs. I hope you understand this.

Let us know

Well, I stopped using drugs after I found out I was pg and haven't gone back and don't plan to after all that has happened to me.
My H stopped using drugs after the baby was born and hasn't gone back either. He claims he wants to start this new good life with me.
My sister on the other hand - well I just don't know.
My H and I have started attending bible study and are really active in the word of God. After everything the devil has put us thru, I just want a good life for my family. H claims to want this too, but I don't know what I can believe from him anymore. Thanks for the advice though.

lcg, it sounds like you've been through hell. I'm sorry this has happened to you. I hope you won't be offended if I ask an obvious question. With the first A and the drug-involvement, why didn't you get yourself on birth control?

My advice to you would be to get your OB/GYN to give you information and supplies for birth control so that you don't have any more children in this difficult situation. Then you and your husband need to get into serious marriage counseling. If it's true that he's drug free, you ought to make this a condition of staying with him, whether or not you believe in divorce.

If he thinks he can victimize you because of your beliefs, chances are good that he will. But if you begin to understand that God (not Paul!) does not want you to stay with a husband who is/has done to you what he did, and that your first obligation is to your children, perhaps you can begin to rebuild your marriage.

The way to empower yourself is to give up your belief that divorce is wrong, or at least be willing to do what you believe is wrong for the sake of your children.

Keep up the prayers, and understand that God often speaks through other people.