If Finn wasn't foolin around with Miss Schuester, and he believed what Finn said, then clearly Miss Schuester needed some lovin, since Finn obviously was interested. Maybe she wouldn't be so uptight, and having a larger paycheck sure would help. The more money he made the less time he had to spend here, and more time he could spend "cleaning pools".
"Of course I think that dude.....Well I mean I think that's what Miss Schuester has in mind. Berry would probably cut off your balls if you ever fooled around with Mr. Shuester's wife. Let me take of this for you-get her off your back."