Lisa's mum, Laura passed away in 2008 following a long illness and the brunette beauty feels her mum sent her fiance Richard Keaveney to her.
"I think she had a little hand in all of this and I still do believe that she does. I feel like I have a little bit of her with me on this journey the whole time," Lisa said.
"She will be very much part of that day. That's very important to me.
"We have a few ideas just to keep it really special. We are going to commemorate her and make her part of the big day. 100pc," Lisa added.
Lisa (35) is set to marry Welshman Richard in an intimate ceremony in Florence this September.
"I'm very excited. I really cannot wait for the big day," she said.
"It's so lovely to be at this point now where everything has fallen into place and it just feels so exciting.
"I just cannot wait to spend all that time with Richard on our honeymoon."
The couple are looking forward to spending some time alone together where they can completely switch off.
"We're going to the Seychelles - to the Hilton Labriz. Then we're going over to one of the islands - Desroches Island," she revealed.
"I believe there's no cell coverage, no nothing, so we're just going to chill on our own, in flip flops for a few days and talk about all the wonderful things that have happened over the past year. That's the plan - just away from everyone."
The TV3 presenter is also looking forward to some down time as she's always busy interviewing celebrities.
"The travel does sometimes [take its toll]. A lot of journalists, when they're going over on junkets they go on the red eye flights," she said.
"Some of them could be 6am, which is fine, but you could be getting up at three in the morning, then you're going all day in London and usually a red carpet may not finish until eight at night.
"More often than not you're back on the nine o'clock flight, but that's all part of the job, you know? You take it in your stride," she added.
Organising a wedding abroad hasn't been easy though and Lisa said she was "overwhelmed" with the preparations.
"It's really quite stressful - I'm quite taken aback at the amount of work involved," she said.
"I had no idea it was going to be like this. On top of the ferocious hours we have on Xpose, it is proving quite a lot to deal with.
"It's tough going; this is not as joyous an experience as I would like. I am wrecked," she added.
Lisa's wedding isn't the only family occasion this year as her grandmother is set to turn 102.
"I can't wait for that. How do you congratulate someone that is 102? It's more than a congratulations - it's such a belief in life isn't it?," she told Woman's Way magazine.
"I really hope God forgets about her… I'm hoping God has forgotten about her because I love her and I want her to be around for as long as possible.
"I love her so much. Having her, even at this age, I learn so much from her still.
"She still has lots of stories to tell. She loves chatting so it's brilliant to hear her, at 102, still telling stories of the days she can remember from back in 1920.
"She's just so special. She's very, very lucky and we're very, very lucky," she added.