Expanding Sexual Relationship With My Man

First time user and poster so be gentle guys....But I feel as this will be a safe place without judgement and bullshit as well as being able to receive honest and experienced views.

Little background story: My man and I have known each other for five years started off as friends and have been dating for just over four now.Things have been good and when we have come up to a problem we work it out and move on and things have gotten better after it. We plan on getting married but right now we just aren't financially stable enough for that step in life.

With me being a little shy and not living on our own yet it makes things kind of tricky for our love life (we don't live together but spend almost everyday together and most nights). Can't be as loud as you want, can't try exciting new things, well we can they just aren't as fun when you have to worry about someone hearing you. We've been experimenting with BDSM and rough play, I like being tied down (the whole "rape" scenario) slapped, choked, you name it and he wants me to do the same to him (even though I'm kind of insecure and haven't stepped it up as far as he has in that area) and he is the only one I have trusted enough to do such with and open these doors.

The subject of the matter: He has mentioned this before, keeps bringing it up, and I'm intrigued, he wants to watch me pleasure and be pleasured by another female. I've had my concerns though and when we talked about it I've made it clear that I'd be more comfortable with him just watching and he is a-0kay with that. Just more excited that I'm willing to even try it. We've been talking at length and he has said I could pick the girl and that his reasons for wanting this is to see two girls pleasuring each other and one of them being his girl. He has also made it clear that he would be jealous if it was a guy as I would be if he were to do stuff with another girl. I've also asked if it were me watching and him with another guy if he'd even be up for that (can't ask for things you won't do yourself ) He hasn't flat out said no but again there would be guidelines and a set point that it wouldn't go past. So he seems at least willing to appease my fantasies as well. (realistically I'd be happy with two guys making out to get turned on and he knows that)

I guess I'm just curious as if anyone has done this and hasn't had any ill effects on their relationship, if it made it better, or anything I should be asking or figuring out before we go through with this.
....or even where to find someone willing to do this with us.

Just some guidance is all, I'm willing to try anything once, twice if I wasn't sure, and three times if I kind of liked it.:2thumbsup: