The moment she touched his shoulders he was infected with drunk whatever too. So yeah... they both were impaired. Casting blame on either of them is unfounded.
The only time he mentioned his relationship with Tasha was during the trial for his life, and Picard said it best, "Under the circumstances I don't think Tasha would mind."
All he did with the Queen was state to the second how long it was since he had sex. He didn't say with who, or announce the circumstances.