Can Someone Explain This Life Estate Like I'm 5?

Location: Florida. My dad (70) recently got remarried to someone he just met last year. He assured me that any assets he had before marriage would go to me, an only child, particularly his house. However, he wanted new wife (69) to have some sort of safety net apparently (she has plenty of money and owns her own home) so he said "she told me there was something we can do that means if I die first, you inherit the home but can't sell/kick her out until she found a new place to live." I had a lot of questions to be honest but we had been fighting a lot about how insanely fast he was moving in this relationship so I just said okay, whatever. She used to own a title company and is therefore far more knowledgeable about this than either of us and to be honest, I barely know her and do not trust her. And I've heard and seen many conflicting things about her already that make me question her intentions. I've heard countless stories of "parent remarries late in life, unfortunately passes first, and then the widow/widower ends up with child's inheritance/house" from good friends of mine to strangers online. I should also say he did NOT sign a pre-nup.

So, today I looked up his property records and found in late September they both signed a 'quitclaim deed reserving enhanced life estate'. I've read through it and think I understand it, but legalese is not a language I speak so I'd love to get to confirmation or maybe further explanation. Am I going to end up as just another 'evil step-parent steals family home' statistic? Or am I grossly misunderstanding? How suspicious do I need to be of her intentions moving forward? This entire thing was HER idea and it was done using HER lawyers, by the way.

I don't know what parts are or are not important, sorry, so I'll just write it all out. The life estate reads as follows (obviously with information redacted):

^{THIS QUICLAIM DEED RESERVING ENHANCED LIFE ESTATE executed DAY IN September, 2026, by first party, Grantors MY DAD and HIS NEW WIFE, husband and wife ( hereinafter referred to as "grantors"}, who post-office address is MY CHILDHOOD ADDRESS, FL, and MY DAD and HIS NEW WIFE, husband and wife (hereinafter referred to as "Life Tenants"), whose post-office is SAME ADDRESS, who shall have a life estate for so long as both of them may live, without any liability for waste, and with full power and authority in Life Tenants to sell, convey, mortgage, lease or otherwise manage and dispose of the Subject Property, as hereinafter defined, in fee simple, with or without consideration, without joinder by the Grantee remaindermen named below, and with full power and authority to keep absolutely any and all proceeds derived therefrom. Upon the death of the last to die of the Life Tenants, title shall immediately vest in second party, Grantees, who shall own the Subject Property in equal shares as) ^{tenants in common:}

^{1st Grantee: MY NAME, MY ADDRESS}

^{2nd Grantee: SOME GUY I'VE LITERALLY NEVER HEARD OF??, HIS ADDRESS}

Okay, so it's NOT a 'when my dad passes, I automatically get the house' situation, she is now the other life tenant?? Meaning I do not inherit this house until SHE dies too, correct? But it also says she could just sell the house WITHOUT my permission and keep all of the proceeds, right?? Basically, I have zero safety net or legal standing with the house since she is a named 'Life Tenant". Did I get this right?

And then, am I also understanding this grantee thing correctly: THIS RANDOM GUY (who is not a random guy but it turns out her SON but I literally had to look him up because I've never met this man or heard of him in my life. He also lives in another state) has equal ownership of the home with me after both life tenants pass??? This is the bit I guess I'm most confused by because it baffles me. He's never been mentioned before to me. Okay, then the other bits after that say:

^{Witnesseth, that the said first party, for the sum of TEN and NO/100 DOLLARS ($10.00}, and other good and valuable consideration paid by the second party, the receipt whereof is hereby acknowledged, and does hereby remise, release, and quitclaim unto the said second party forever, subject to the life estate reserved to the Life Tenants, the following described property:)

^{Property address: My childhood home
Legal description: It's actually TWO lots, one with the house on it and one across the street that is undeveloped land.}

^{The conveyance made hereby is made by Grantors and accepted by Grantees, subject to the following matters, to the extent same are in effect at this time, any and all restrictions, covenants, conditions, liens, encumbrances, reservations, easements, and other exceptions to title, if any, releasing to the property, but only to the extent they are still in force and effect and shown of record in THEIR COUNTY, Florida, and to all zoning laws, regulations and ordinances of municipal and/or other governmental or quasi-governmental authorities, if any, relating to the property and to all matters which would be revealed by an inspection and/or a current survey of the property.}

^{Life Tenants shall have the full power and authority, without the joinder or consent of the Grantees or any other person, to amend, revoke, divest, replace, change or alter the designation of the Grantees by a further conveyance, which may eliminate any and all rights that the Grantees may possess under this deed, including a conveyance back to Grantors, at which time Grantors may designate one or more different Grantees. The Grantees shall have no right, power, or authority to assign, transfer, encumber, or otherwise dispose of the Subject Property or any part thereof until the death of both Life Tenants. No interest in the Subject Property shall be subject in any manner to any claim, liability, attachment, execution, or other process of law of any creditor of the Grantees.}

So, basically, I could just be removed as Grantee at any point and/or another Grantee could be added? Is this normal? From the very cursory search I did on life estates earlier, it seemed that typically once one is in place, any sales, refinancing, etc. can only be done with the express permission of the Grantee. And once added, the Grantee cannot be removed without their signature. Obviously this is not that situation here so my other question would be how standard is this kind of life estate? Does this all smell a bit fishy?

Side note, it really isn't about the money for me, I own my own home and have my own savings. But this house was my late mother's dream home that she designed with an architect and then poured her heart and soul into. She would want more than anything for it to stay in her family, particularly going to my son (I thought this was what my dad wanted too...) My father's new wife has already been making considerable changes to it despite only living there/being married to him for four months. I've already accepted that the house may never go to me or my son and I might not see any of my dad's assets. That's whatever. However, this may irrevocably change my relationship with my dad and his wife. Sorry for the novel and thanks for reading!