Seeing Skyfire had been shocking enough. When the idiot failed to see the right place was at Starscream's side, the Seeker tried to blot out all awareness of his bondmate. Unfortunately, his initial scans processed fully and demanded attention just after their encounter.
Starscream dared not mention his findings even along the trine bond. But having glimpsed a frail spark pulse against the steadier one of Skyfire made Starscream accept Skyfire's choice.
Let him have access to Autobot resources for now. In time, Starscream would claim the result as his own, no matter how Skyfire resisted. For their creation would be quite useful, the Seeker decided.