I, too, found that bizarre, lax.

So, I am just going to try to imagine what MY OWN actions would have been in that situation, and this is what I come up with, if I try to imagine that I am the one who relapsed, and my husband is going to be very angry with me. I doubt I would get kicked out if it happened at this point, but if I went on some kind of a binge, and kept acting up, it would certainly be a possibility. Regardless, I know he is going to be extremely upset and disappointed and it's not going to be a good time.

I (hypothetically, not in actuality) am imagining I just relapsed. I had a dumb ass attack, a moment of weakness, stress, whatever, and I bought say a gram and did half of it.

My next action depends on whether I (a) want RID of it, don't want it at all, and (b) I decide that I might want the rest of it at a later time.

Depending, I either (a) throw it away, flush it, etc or (b) carefully hide this small amount of dope where I feel he won't find it.

A is obviously the best choice, and I can try to feel out the situation to see if I can talk about what has happened later, or if it's something I need to FORGET EVER HAPPENED.
If I choose B, I'm sneaking around, because I have dope that I'm planning on consuming later. Or maybe, I will discard it, when I'm strong enough.

I go off to work, and when I return, hubby has found my bag. (Choice B). He wants to know what it is. He knows what it is. He is even going to test it. OK at that point, I'm not going to start lying, saying I don't know what it is all the other BS things. I'm just going to go ahead and fess up. Why hold onto the line of crap when you KNOW you you're busted. At that point, I would just confess and take whatever was coming. Since I want to maintain the relationship, I'm going to apologize, and not get into a bunch of defensive BS and crazy lies.