Jill lost her husband Bobby to cancer this weekend, and a source told RadarOnline.com although Frankel previously dumped the couple as friends, the insider said, she's been invited to the memorial service in New York on Sept. 15.
"Jill feels that life is too short and holding onto hate and ugly feelings just isn't worth it," the source noted.
"Jill wants to remember all the good times and there was a time when Bobby and Bethenny were very close. When Bethenny had no money, Bobby was great to her. And if it wasn't for Bobby and Jill, Bethenny would never have been cast on the Bravo Housewives show."
As Radar reported on Saturday, Bobby died at age 71 after a long battle with thyroid cancer.
Devoted Jill held vigil at Bobby's bedside during his final days.
Meanwhile, Jill, 54, and Frankel, 47, have been in a bitter feud since 2010.
Jill was fired from RHONY after the show's fourth season. She later filmed a cameo with Luann De Lesseps, but Frankel still refused to appear with her former friend after their fallout about seven years ago.
Frankel explained to talk show host Andy Cohen, "I remember there was a turning point … I was hosting the Today show. When I got there, the first thing that was told to me by the producers was Jill called her and she lost her mind. 'Why not me? I'm better than her.'"
Also, on season three of RHONY, Jill tore into Frankel for not calling her husband Bobby after a medical procedure.
Now, however, the source said Jill wants to bury the hatchet. According to the source, Sonja Morgan and Aviva Drescher have also been invited to the funeral. But they have been told NO camera crews.
While De Lesseps has also been invited, it's unknown if she will be able to attend because she's in rehab following her embarrassing arrest.
Radar previously reported, mother of two De Lesseps was arrested on December 23 after allegedly entering the wrong hotel room with a man in Palm Beach and refusing to leave. According to the police report, she threatened cops while they tried to arrest her and told officers she wanted to kill them.
De Lesseps said she was embarrassed by the bizarre incident, and has reportedly been getting help in a rehab program.
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