Usha sounded pretty squicked, and she didn't even know - because Ruth wouldn't tell her - that it's Sam.

She did, however, point out that a 'wonderful, kind man'† who makes a move on you when you are upset and suffering from low self-esteem is, looked at from an outsider's perspective, taking advantage of the vulnerable and confused.

† Her very words. No wonder Usha didn't guess it was Sam!