Article continues below advertisementMelissa Gilbert isn't holding back about her six-year relationship with Rob Lowe, describing it as "very tumultuous" and revealing how his skyrocketing fame impacted their romance during the '80s.The Little House on the Prairie actress, now 61, opened up about her experiences on the latest episode of the "I Choose Me" podcast with host Jennie Garth. Together, they discussed the challenges they faced in their early relationships under the public eye.