Please don't make a duplicate! Please take advantage of the Help Index in the upper-right, and also the Style Guide. My best suggestion for new members is to read, read, and then read some more. You are off to a good start by asking here.
Might also want to check out (and consider signing) our Honor Code
Is the profile in question Stevens-8028? (in future, you can link the profile when you write your question- or you could even link it now)
You can try to contact the profile manager, but she has not been active since May 2015 (by checking her contributions). Sometimes people who are not very involved will respond to a Trusted List request, if nothing else.
If you don't get a response, you can go through the process for unresponsive profile manager, and have the profile "orphaned"
When you have a good source for the identity of Leslie's parents, then you can connect them, (but please do this only on the basis of something reliable, such as a primary source). This page is great on sources, Jillaine's Dream Source Help Page - especially the part titled "What is a Source?" with the link to "Evidence Explained." (for instance, "GRO" might not be enough information for folks outside of the UK)
WikiTree is a different animal. As a collaborative process, the pace can seem slow ... but it is for a reason. The correct changes do happen - not quickly - but they do happen.
For now, as others have agreed, you can add what citations you have to the profile, and continue to look for more good sources.