This was a pickle, if she was going to lay down on him he would be pinned under her and vunerable unless he could get his legs under his body and push himself up, twisting his head before so so that he would not fall down. Despite her young age she seemed to be a much more compedent fighter than her father. As the thoughts flooded him about what to do, he snarled and tensed up. (no attacks or movement at this point)
Feeling her body descending on his head, Virus slid his cranium from her lower chest backwards but before she fully laid down and before he had fully lifted his head back, his jaws would open, reaching to grasp her left elbow which would be the closest to his jaws at this angle.
If he grabbed a hold of her elbow, Virus would crush it between his teeth, twisting his head this way and that to get as much damage as possible to the joint.
If his attack failed then he would twist his body so that he faced her head on instead of his body facing her on the side and use the position of his head, being right under her chest, to kick off the ground and slam his neck and shoulder along with a hundred and fifty pounds of wolf to back it up right into her front end to try and either force her off of his body and cause her to stumble back, or secure a place for her ontop of him where she would not be able to reach his vunerable neck and legs.
If she stumbled back, he would use his momentum to charge forward, fangs snapping at that lovely face of hers to claim her left eye like she had tried to do to him. If her head shifted he would instead go for that vunerable neck, lowering his head and twisting it slightly to get a good angle as he would try and chomp onto her throat.
If she did not stumble back but rather had her front end over his shoulders like he had tried to secure her, Virus would be at a much easier position to either snap at her stomach, which would not be closer to his jaws to be torn away, or at her back legs where her knees would be vunerable to his attacks.
At first he would snap at her belly once more, attempting to grab a hold of the tender flesh and tear it up but if she tried to dodge he would instead shift his attention to her shifting legs and part jaws in an attempt to grasp the nearest one and secure a hold, biting deeply into her flesh until he felt bone.