Erin Muller must not read celebrity gossip websites.

That's the only excuse this woman would have to marry Michael Lohan, which OK! reports is actually set to take place.

"Michael recently proposed to his girlfriend Erin Muller," a source told that tabloid. "But they're keeping it quiet for the moment."

Michael Lohan is engaged to Erin Muller.

The couple may not be saying anything out loud - until magazines shell out the big bucks, of course - but the ring Erin flashed last weekend at the Mercedez-Benz Bridgehampton Polo Tournament made it clear this pair is engaged.

It's a good thing Eric isn't a lesbian. Lohan hates those.