A lovesick 63-year-old had a fixation on his former partner when he harassed her daughter by continuously turning up outside her Dublin home, a court heard.
Jilted William Whelan said he was trying to rekindle his relationship with the woman, even though he knew she had moved to Lanzarote.
The daughter said she was left "a nervous wreck" by his behaviour, which was "not normal".
Judge John Hughes gave him a nine-month suspended sentence.
Whelan, a retired trucker, of Churchview, Nurney, Co Kildare, pleaded guilty to nine counts of harassing Tanya McDonald and one of trespass.
Gda Keith Murphy told Dublin District Court the incidents happened between January 25, 2017 and last October 31.
Sometimes Whelan would park his car, slowly drive past or walk up and down outside Ms McDonald's home in Donaghmede. When confronted, he said he was there to see her mother.
Some of the incidents happ-ened in the early hours of the morning.
She once saw him at Donaghmede Shopping Centre car park and confronted him.
In the last incident, he was captured on CCTV she had installed because of him. He went down the side of her house at 8.40pm, into the back garden.
Whelan had no reason to be in the area, Gda Murphy said.
There were no "direct threats", but the victim was afraid. She told the court she lost sleep sitting up watching the CCTV.
She did not know what Whelan wanted, as his relationship with her mother had ended badly and he was told she was not around.
Whelan maintained he did not think he was harassing any-one and "just wanted to speak" to Ms McDonald's mother.
Whelan "misjudged the situ- ation very badly", his solicitor said.
He had been "very attached to" the victim's mother, found the break-up difficult to accept and did not realise the distress he was causing.
Judge Hughes ordered him to stay away from the victim and her mother or he could be jailed.