Females do not always "scent". I have plenty of females that have laid many years in a row, and never made a mess in the tub, or even tail wagged for that matter. Also, sometimes all of the mess in the tub (i.e. "scenting") is deposited by the male.
In regards to your picture, while that could be promising, it could also be that the male hasn't figured it out yet, or that the female is rejecting him, and not allowing him access. Another thing to look for, would be his tail actually touching the side of her (with the underside of his tail touching the side of her tail). In this position, he is actually stimulating her with his spurs, and trying to convince her to let him breed. If you see this activity, I would be more inclined to say the breeding was close.
Hope that helps,
Reply With Quote