The Nothing Compares 2 U singer revealed to her Twitter followers she and Barry Herridge had a “mad love making affair”.
They couple wed on December 8 in Las Vegas only to split just 16 days later.
At the time, she cited “intense pressure placed upon him” by other people.
But in a series of gushing tweets, Sinead wrote: “Guess who had a mad love making affair with her own husband last night? (sic
“mother*****r who dont like it … so me all happy!! me love me hubby … he love me … f**k who no like it … God is good! (sic)
“yay!!! me husband is a big hairy cave man an came to claim me with his club : ) and now im in cave-land. yay!! we both go panto! (sic)
“YAAAAAAAAAAAAAAAAAAAAYYYYYYYYYYYYYYY!!!!! And… me go LA tomorrow!! hurraay!! (sic)”
While the couple are back together again, O’Connor, 45, and Herridge acknowledge they had a whirlwind romance and are planning to take things slowly.
She added in other tweets: “Yay!!! we decided to be boyfriend and girlfriend again an stay married but we did rush so we gonna return to b friend g friend
“an be sickenly happy an go counsellin an move in in like a yr like regular people. but stay married an we all in love an f**k every other (sic)”
O’Connor – who has been married three times before – tied the knot with Dubliner Herridge in a drive-through wedding at the Little White Wedding Chapel on the Las Vegas Strip, which took ten minutes.
She wore a pink, low-cut dress which revealed her tattoos, while the groom donned a dark jacket and pink shirt.