Kristin Cavallari, 37, poses in a string bikini during vacation with Mark Estes, 24… after sharing she was 102lbs during Jay Cutler marriage

Kristin Cavallari shared a pinup bikini image to Instagram on Sunday.

The 37-year-old reality TV star was in a hot tub with a dramatic view of a valley as she held on to a coffee mug.

The jewelry designer was spending her down time at the Bolt Farm Treehouse Hotel, a ‘resort A luxury, mountaintop experience’ in Tennessee.

The blonde beauty was with her 24-year-old boyfriend Mark Estes.

The two adorably posed in matching sweatshirts as they seemed to be having a romantic time in the woods.

This comes after she addressed her weight loss years ago when she was married to former football player Jay Cutler, 41, her husband from 2013 until 2022.

She said that she got down to 102lbs and was ‘very thin’ due to stress from the ‘unhappy’ union that resulted in three children.

And now the Uncommon James designer is back up to 114lbs which the 5ft3in star feels better about, she added.

Cavallari made her comments during an episode of her Let’s Be Honest podcast.

The Laguna Beach star was asked by a fan how she looked so thin when making Very Cavallari, which aired from 2018 to 2020.

‘I was very thin. I’ll put it in perspective for you guys. I’m 5’3′. I currently weigh 114lbs. Filming Very Cavallari, I got down to 102lbs and I was eating the same amount of food that I’m eating now,’ she explained.

Cavallari admitted that the marriage was ‘unhappy’ and made her stress out.

‘The difference was I was so unhappy and so stressed out,’ she explained.

‘I look back at photos from that time period and I am like, “Holy s**t!’ I was rail f***ing thin. I was skin and bones. I looked like s**t,’ she admitted.

‘I think I look so much better now. And you guys, that was just stress. That was being in a really unhappy marriage, quite honestly. Literally, I was so unhappy and I had way too much on my plate.’

And the jewelry designer added she thinks she is better off at 114lbs.

This is not the first time Kristin has talked about her weight loss during her Cutler marriage.

In June 2022, she shared that she was happy with her figure after having added a few extra pounds.

In an interview with Us Weeklythe reality TV star provided an update on her approach to health and fitness.

‘My goal is sort of, right now, just to maintain the muscle that I have. I’m not trying to lose weight,’ the Uncommon James founder told the outlet.

She continued, ‘I don’t weigh myself. I can tell how my clothes fit me.’

Kristin added, ‘I’ve put on a lot of weight in the last few years, but in a good way.’

The Very Cavallari alumna noted at the time that she looked at old photos of herself and was ‘shocked at how thin’ she had once been.

‘I didn’t realize it at the time, how thin I was,’ she admitted. ‘So I’m happy that I’ve put on weight.’

Kristin acknowledged that her naturally slender body type made it challenging for her to build muscle.

‘I’m really petite. I have no hips. I’m just small,’ she explained.

‘And so if I don’t work out for like a week or two, I feel like all my muscle goes away. So it is about consistency for me.’

The television personality revealed that she now works out three days a week with a personal trainer who ‘kicks my a**’.

‘He pushes me really hard. He has me actually lifting really heavy weight, the heaviest weight I’ve ever lifted in my entire life,’ she said.

‘I feel the best I ever have. I feel like I’m the strongest I’ve ever been. I’m just really comfortable in my skin right now, which is a really good feeling.’

The designer went on to say that she will often do a fourth day of exercise on her own including working out for 30 minutes on a VersaClimber, which she adds, ‘will also kick your butt, man.’