My first pair had mostly 1 way grooming, and they were really close. The cuddled A LOT, and were just very relaxed around each other. With my current pair, I didn’t get mutual grooming until about 48 hours into their marathon. So it might still happen for your two.
If Coffee requests grooms from Butterscotch (CUTE NAMES btw!), what does she do? It sounds like since she is cuddling up to him (if I have it straight), then she likes him, whether he’s grooming her or not, so I think you are probably in good shape.
Another thing I’ve noticed with my pairs is that when they are bonded, they can basically clamber all over each other (like if I come over with a treat, or they gare in a tight space together) and not be fussed about it. Neither bun is tense at all around the other.
Above all, trust your gut! If you feel they just aren’t quite 100%, try marathoning, try a new bonding area, or add a bit of stressing to see if you can push them that last bit.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.