Ashfur's mate is not explicitly stated in the series, as he is not shown having a mate in the books. Some fans speculate that Scourge's sister, Squirrelflight, could potentially be his mate in an alternate timeline from the Warriors series "The Prophecies Begin."
Squirrelflight's father was Firestar.
Squirrelflight is Leafpool's sister!
Mate: Sandstorm Daughters: Squirrelflight, Leafpool Father: Jake Mother: Nutmeg Sister: Princess Half-Brothers: Scourge, Socks Half-Sister: Ruby Nephew: Cloudtail Grand-Nieces: Whitewing, Amberkit Grand-Nephews: Dewkit, Snowkit Great-Grand-Nieces: Dovewing, Ivypool Grandsons: Lionblaze, Jayfeather Granddaughter: Hollyleaf
Assuming that you are talking about Squirrelflight's big lie, Squirrelflight lied to protect Leafpool as well as Jayfeather, Lionblaze, and Hollyleaf from the truth.
No, Birchfall is her mate as he is the father of Dovekit/paw and Ivykit/paw -Rootkit of Smokeclan-
Ashfur did not kill Squirrelflight in any book. He did attempt to harm her in "Sunset" (Warriors: The New Prophecy series) by attempting to push her off a cliff, but Squirrelflight survived. Ashfur's actions were driven by his jealousy and betrayal, but they did not lead to Squirrelflight's death.
no squirrelflight WAS mates with Brambleclaw but not anymore,and ashfoot is a windclan she-cat
Squirrelflight is not infertile. She and Bramblestar have kits together in the Warrior Cats series.
No. It is true that he loved her once, but she left him for Brambleclaw. Once she did that, Ashfur could only feel hurt, and he wanted Squirrelflight to suffer, just as she had made him suffer. It is possible now that he is dead that he regrets his mistake, but it is unlikely. --- Yes. Ashfur will always love Squirrelflight, there was a period when he THOUGHT he hated her and wanted to make her feel pain, but nothing could have driven him on like love. His mind was twisted, but he loved her. Once he entered life in Starclan (Yes Starclan, if Mudclaw got in, why shouldn't he?) his mind was unclouded and he saw things as he should have before, unbiased. And he realized that he still loves her, and will always love her. Whether or not he has completely forgiven her for not chosing him remains to be seen, the fact is he loves her.
they didn't squirrelflight lied.
No, Leafpool is not the mother of Squirrelflight's kits. Squirrelflight's kits, Alderheart and Sparkpelt, were actually born to Squirrelflight and Bramblestar. Leafpool is Squirrelflight's half-sister.